If I am traveling upward in an elevator at a constant velocity, I will appear to weigh more than I normally do.
A. True
B. False

Answers

Answer 1

Answer:

A

Explanation:

I know that it's true

Answer 2
Answer: A
Hope this helps

Related Questions

On a sunny summer day, why does a white car with a light-colored interior stay cooler than a black car with a dark-colored interior?

Solar radiation reflects off the lighter colours, away from the car, thus keeping the car cool

Solar radiation is absorbed into the lighter colours, keeping the car cool

Solar radiation is absorbed into the darker colours, keeping the car cool

Solar radiation reflects off the darker colours, away from the car, thus keeping the car cool

Answers

Answer: Solar radiation reflects off the lighter colours, away from the car, thus keeping the car cool

Explanation: This is because lighter colors reflect a good amount of radiation while darker colors absorb it. Just like, Antarctica hasn't completely melted because it reflects a lot of the heat that is acting upon it. Or, you notice that you get hotter when you wear a black shirt opposed to a white one.

An oldcamp fire is uncovered during an archeological dig its charcoal is found to contain less than 1/1000 the normal of carbon 14 estimate the minimum age of the charcoal noting that 2^10 =1024

Answers

The minimum age of the charcoal is estimated to be approximately 57,000 years old,

Based on the information provided, the charcoal from the old camp fire contains less than 1/1000 the normal amount of carbon 14. Carbon 14 has a half-life of approximately 5730 years. Using the formula for exponential decay, we can estimate the minimum age of the charcoal.

If we assume that the original amount of carbon 14 in the charcoal was 1000 times greater than the amount found during the archeological dig, we can use the following equation:

N = N0 x (1/2)^(t/t1/2)

Where:
N = the amount of carbon 14 found during the dig
N0 = the original amount of carbon 14 in the charcoal
t = the time that has passed since the charcoal was last alive
t1/2 = the half-life of carbon 14

If we plug in the values we know, we get:

N = 1/1000 x N0
t1/2 = 5730 years

1/1000 N0 = N0 x (1/2)^(t/5730)

We can simplify this equation by dividing both sides by N0 and taking the natural log of both sides:

ln(1/1000) = (t/5730) x ln(1/2)

-6.9078 = -0.6931 x (t/5730)

Solving for t, we get:

t = (-6.9078) x (5730/-0.6931)

t ≈ 57,000 years

Therefore, the minimum age of the charcoal is estimated to be approximately 57,000 years old, assuming the original amount of carbon 14 was 1000 times greater than the amount found during the archeological dig. Additionally, we note that 2^10 = 1024 was not needed to solve this problem.

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A frequently quoted rule of thumb in aircraft design is that wings should produce about 1000 N of lift per square meter of wing. (The fact that a wing has a top and bottom surface does not double its area.)
(a) At takeoff the aircraft travels at 58.0 m/s, so that the air speed relative to the bottom of the wing is 58.0 m/s. Given the sea level density of air to be 1.29 kg/m3, how fast (in m/s) must it move over the upper surface to create the ideal lift?
m/s
(b) How fast (in m/s) must air move over the upper surface at a cruising speed of 240 m/s and at an altitude where air density is one-fourth that at sea level? (Note that this is not all of the aircraft's lift--some comes from the body of the plane, some from engine thrust, and so on. Furthermore, Bernoulli's principle gives an approximate answer because flow over the wing creates turbulence.)
m/s

Answers

The ideal lift of 1000 N per square meter of wing can be achieved by applying Bernoulli's principle, which states that for an ideal, incompressible fluid, the pressure exerted on the upper surface of a wing will be lower than the pressure on the lower surface.

This is because the air is moving faster over the upper surface than the lower surface. At sea level, the air density is 1.29 kg/m3, so the air must move over the upper surface at 58.0 m/s to create the ideal lift.

At an altitude where the air density is one-fourth that of sea level, the air must move over the upper surface at a higher speed to create the same lift.

Using Bernoulli's principle, this speed would be approximately 240 m/s, the cruise speed of the aircraft. It is important to note that this is not the only factor determining the lift of an aircraft--thrust from the engines and the shape of the aircraft body also contribute to lift.

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Equipment such as chafing dishes, steam tables and heated cabinets designed to hold foods hot should at least keep food temperatures at _____ or hotter:
135°F (57°C)
140°F (60°C)
155°F (68°C)
165°F (74°C)

Answers

Equipment such as chafing dishes, steam tables and heated cabinets designed to hold foods hot should at least keep food temperatures at 140°F (60°C) or hotter. The correct answer is 140°F (60°C).

Food safety is a crucial aspect of any foodservice operation. Keeping hot correct food temperatures is essential in preventing the growth of harmful bacteria. The temperature range of 140°F (60°C) to 165°F (74°C) is considered the "danger zone" for hot foods, as this range allows bacteria to grow rapidly.

Therefore, equipment such as chafing dishes, steam tables, and heated cabinets designed to hold hot foods should maintain a minimum temperature of 140°F (60°C) or hotter.

This ensures that the food remains safe to eat and reduces the risk of foodborne illness. It is also important to check the temperature of the food regularly using a thermometer to ensure that it is being held at the correct temperature.

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The defense is the team that is trying to score a goal.
A. True
B. False

Answers

Answer:

true

Explanation:

The defense is the team that is trying to score a goal. False

1. A car starts from the rest on a circular track with a radius of 300 m. It accelerates with a constant tangential acceleration of a = 0.75 m/s?. Determine the distance traveled and the time elapsed"

Answers

Starting from rest on a circular track with a radius of 300 m and a constant tangential acceleration of 0.75 m/s², the car will travel a distance of approximately 0.2119 meters or 21.19 centimeters in 0.75 seconds.

To determine the distance traveled and the time elapsed by the car starting from rest on a circular track with a radius of 300 m and a constant tangential acceleration of 0.75 m/s², we can use the equations of circular motion.

The tangential acceleration is the rate of change of tangential velocity. Since the car starts from rest, its initial tangential velocity is zero (v₀ = 0).

Using the equation:

v = v₀ + at

where v is the final tangential velocity, v₀ is the initial tangential velocity, a is the tangential acceleration, and t is the time, we can solve for v:

v = 0 + (0.75 m/s²) * t

v = 0.75t m/s

The tangential velocity is related to the angular velocity (ω) and the radius (r) of the circular track:

v = ωr

Substituting the values:

0.75t = ω * 300

Since the car starts from rest, the initial angular velocity (ω₀) is zero. So, we have:

ω = ω₀ + αt

ω = 0 + (0.75 m/s²) * t

ω = 0.75t rad/s

We can now substitute the value of ω into the equation:

0.75t = (0.75t) * 300

Simplifying the equation gives:

0.75t = 225t

t = 0.75 seconds

The time elapsed is 0.75 seconds.

To calculate the distance traveled (s), we can use the equation:

s = v₀t + (1/2)at²

Since the initial velocity (v₀) is zero, the equation becomes:

s = (1/2)at²

s = (1/2)(0.75 m/s²)(0.75 s)²

s = (1/2)(0.75 m/s²)(0.5625 s²)

s = 0.2119 meters or approximately 21.19 centimeters

Therefore, the car travels a distance of approximately 0.2119 meters or 21.19 centimeters.

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what is the electric potential 4.20 m from a -3.37*10^-6 C charge?

Answers

Answer:

\(V =-7221.43 \ V\)

Explanation:

The Electric Potential

The electric potential at a point is equal to the electric potential energy (measured in joules) of any charged particle at that location divided by the charge (measured in coulombs) of the particle.

To calculate the electric potential of a point charge Q at a distance r, we use the formula:

\(\displaystyle V=\frac{kQ}{r}\)

Where

\(k=9\cdot 10^9\ N.m^2/c^2\)

We are given the following data:

\(Q=-3.37\cdot 10^{-6}\ c\)

r = 4.20 m

Calculating:

\(\displaystyle V=\frac{9\cdot 10^9*(-3.37\cdot 10^{-6})}{4.2}\)

\(\mathbf{V =-7221.43 \ V}\)

Answer:

-7221.43 V

Explanation:

its for Acellus

Classification of living things is necessary

Answers

Classification of living things is necessary to organize and understand the immense diversity of life on Earth.

It allows us to systematically categorize organisms based on their shared characteristics, relationships, and evolutionary history. By classifying living things, we can identify patterns, make predictions, and gain insights into the biological world.

Classification provides a framework for scientists to communicate and exchange information effectively. It enables us to develop a common language and reference system for discussing different species and their traits. It also aids in the identification and discovery of new species, facilitating research, conservation efforts, and the development of medical treatments.

Moreover, classification helps us recognize the interconnectedness and interdependence of various organisms within ecosystems. It highlights the evolutionary relationships between species, revealing shared ancestry and evolutionary patterns.

Overall, classification of living things is crucial for scientific understanding, communication, and management of biodiversity, contributing to our knowledge of the natural world and its complex web of life.

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4. A 1000 kg cannon fires a 10 kg cannonball. When the cannon is fired, the
cannonball goes forward at 935 m/s.
a. What is the momentum of the system just before the explosion?
a. What is the momentum of the system after?
a. What is the final velocity of the cannon?

Answers

The system's momentum is zero prior to the explosion since the cannon and cannonball are both at rest.. Following the explosion, the system's overall momentum is conserved. The overall momentum before and after the explosion must be the same in accordance with the law of conservation of momentum.

What is the cannon's speed?

Between 250 and 100 m/s seems to be the most plausible range (250 m/s is equivalent to 820 feet per second).

What is the recoil velocity formula?

v2 = - 2 m/s

The above equation's negative sign tells us that the gun's velocity and the bullet's velocity are diametrically opposed. Hence, the firearm will recoil.

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Describe possible factors influencing incoming solar radiation,
composition of incoming radiation, and what ultimately happens
(percent breakdown) to the radiation that does enter the
atmosphere.

Answers

Factors influencing incoming solar radiation include solar angle, atmospheric conditions, and surface characteristics.

Several factors influence the amount of solar radiation reaching Earth's surface. The solar angle, determined by the Earth's tilt and position in its orbit, affects the intensity of radiation. Atmospheric conditions such as cloud cover, aerosols, and pollution can scatter or absorb radiation. Surface characteristics, such as albedo (reflectivity) and vegetation, also influence the amount of incoming radiation.

The composition of incoming solar radiation consists primarily of visible light, ultraviolet (UV) radiation, and infrared (IR) radiation. Visible light is the range of wavelengths perceived by human eyes. UV radiation has shorter wavelengths and can be harmful to living organisms. IR radiation has longer wavelengths and carries heat energy.

Once solar radiation enters the atmosphere, several processes occur. Approximately 30% of incoming radiation is reflected back into space by clouds, atmospheric particles, and the Earth's surface. About 20% is absorbed by the atmosphere, including gases like ozone and water vapor. The remaining 50% reaches the Earth's surface, where it is absorbed by land, water, and vegetation, contributing to various physical and biological processes such as heating the Earth's surface, driving weather patterns, and supporting photosynthesis.

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As a city planner, you receive complaints from local residents about the safety of nearby roads and streets. One complaint concerns a stop sign at the corner of Pine Street and 1st Street. Residents complain that the speed limit in the area ( 8989 km/h) is too high to allow vehicles to stop in time. Under normal conditions this is not a problem, but when fog rolls in visibility can reduce to only 4747 meters. Because fog is a common occurrence in this region, you decide to investigate. The state highway department states that the effective coefficient of friction between a rolling wheel and asphalt ranges between 0. 5360. 536 and 0. 5990. 599 , whereas the effective coefficient of friction between a skidding (locked) wheel and asphalt ranges between 0. 3500. 350 and 0. 4800. 480. Vehicles of all types travel on the road, from small cars with a mass of 563563 kg to large trucks with a mass of 39513951 kg. Considering that some drivers will brake properly when slowing down and others will skid to stop, calculate the minimum and maximum braking distance needed to ensure that all vehicles traveling at the posted speed limit can stop before reaching the intersection

Answers

The minimum and maximum braking distances needed to ensure that all vehicles traveling at the posted speed limit can stop before reaching the intersection are as follows:

- For small cars: Minimum ≈ 1773.028 m, Maximum ≈ 1568.850 m

- For large trucks: Minimum ≈ 3285.760 m, Maximum ≈ 2409.595 m

To calculate the minimum and maximum braking distances, we can use the equations of motion for a decelerating vehicle.

The equation for the braking distance of a vehicle is given by:

d = (v^2) / (2 * μ * g)

where d is the braking distance, v is the initial velocity of the vehicle, μ is the coefficient of friction between the tires and the road, and g is the acceleration due to gravity.

Let's calculate the minimum and maximum braking distances separately for small cars and large trucks.

For small cars with a mass of 563 kg:

- Minimum braking distance:

  v = 8989 km/h = (8989 * 1000) / 3600 m/s = 2496.944 m/s

  μ_min = 0.536

  d_min = (v^2) / (2 * μ_min * g) = (2496.944^2) / (2 * 0.536 * 9.8) ≈ 1773.028 m

  Maximum braking distance:

  μ_max = 0.599

  \(d_max = (v^2) / (2 * μ_max * g) = (2496.944^2) / (2 * 0.599 * 9.8) ≈ 1568.850 m\)

For large trucks with a mass of 3951395 kg:

- Minimum braking distance:

  v = 8989 km/h = 2496.944 m/s (same as for small cars)

  μ_min = 0.350

 \(d_min = (v^2) / (2 * μ_min * g) = (2496.944^2) / (2 * 0.350 * 9.8) ≈ 3285.760 m\)

  Maximum braking distance:

  μ_max = 0.480

 \(d_max = (v^2) / (2 * μ_max * g) = (2496.944^2) / (2 * 0.480 * 9.8) ≈ 2409.595 m\)

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In the figure C1=C2=2C3=27.0μF, if , how much charge is stored on each capacitor when V=43.0V? answers separated by commas please.

Answers

The charge stored on each capacitor is 232.2μC, 232.2μC, and 464.4μC, respectively.

In the given figure, we can see that the capacitors C1 and C2 are connected in parallel, and the capacitor C3 is connected in series with the parallel combination of C1 and C2.

The equivalent capacitance of the parallel combination of C1 and C2 is given by:

Cp = C1 + C2 = 27.0μF + 27.0μF = 54.0μF

The equivalent capacitance of the series combination of Cp and C3 is given by:

1/Cs = 1/Cp + 1/C3 = 1/54.0μF + 1/13.5μF = 0.0185 + 0.0741 = 0.0926

Cs = 1/0.0926 = 10.8μF

The charge stored on the equivalent capacitor Cs is given by:

Q = Cs * V = 10.8μF * 43.0V = 464.4μC

Since the charge on the capacitors in series is the same, the charge stored on C3 is also 464.4μC.

The charge stored on the capacitors in parallel is given by:

Qp = Cp * Vp = 54.0μF * Vp = 464.4μC
Vp = 464.4μC / 54.0μF = 8.6V

The charge stored on each of the capacitors C1 and C2 is given by:

Q1 = C1 * Vp = 27.0μF * 8.6V = 232.2μC
Q2 = C2 * Vp = 27.0μF * 8.6V = 232.2μC

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The figure shows a rod with two weights on the sides. You are going to rotate the rod at the center of the rod. If the mass of the rod is 30 g, each weight is 50 g, calculate the following.
a. Rotational inertia of the rod.
b. Rotational inertia of a weight (as a hoop).
c. Total rotational inertia.

The figure shows a rod with two weights on the sides. You are going to rotate the rod at the center of

Answers

a. The rotational inertia of the rod is 0.0004 kgm²

b. The rotational inertia of a weight is 0.0009025 kgm²

c. The total rotational inertia is 0.002205 kgm²

What is rotational inertia?

Rotational inertia is a property of an object which shows its aboility to rotate about an axis.

a. What is the Rotational inertia of the rod?

The rotational inertia of  a rod is given by I = 1/12ML² where

M = mass of rod and L = length of rod.

Given that

M = 30 g = 0.030 kg and L = 40 cm = 0.40 m

So, substituting the values of the variables into the equation, we have that

I = 1/12ML²

= 1/12 × 0.030 g × (0.40 cm)²

=  1/12 × 0.030 kg × 0.1600 m²

=  1/12 × 0.0048 kgm²

= 0.0004 kgm²

So, the rotational inertia of the rod is 0.0004 kgm²

b. What is the  Rotational inertia of a weight (as a hoop).?

The rotational inertia of the weight (as a hoop) is given by I' = 1/2mL' where

m = mass of weight and L' = distance of COM of weight from axis

Given that

m = 50 g = 0.050 kg and L = 19 cm = 0.19 m

So, substituting the values of the variables into the equation, we have that

I' = 1/2mL'²

= 1/2 × 0.050 g × (0.19 cm)²

= 0.025 kg × 0.0361 m²

= 0.0009025 kgm²

So, the rotational inertia of a weight is 0.0009025 kgm²

c. What is the Total rotational inertia?

The total rotational inertia, I" = rotational inertia of rod + rotational inertia of both weights.

So, I" = I + 2I'

= 0.0004 kgm² + 2 × 0.0009025 kgm²

= 0.0004 kgm² + 0.001805 kgm²

= 0.002205 kgm²

So, the total rotational inertia is 0.002205 kgm²

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A ball initially rolling at 10 m/s comes to a stop in 25 seconds. Assuming the ball hass uniform deceleration,
how far does it travel during this time interval PLS HURRY

Answers

Answer:

x = 125 [m]

Explanation:

To solve this problem we must use the following kinematics equations.

\(v_{f} = v_{i} - (a*t)\)

where:

Vf = final velocity = 0

Vi = initial velocity = 10 [m/s]

t  = time = 25 [s]

a = acceleration [m/s2]

Note: the negative sign of the last term of the equation means that the speed decreases, that is, the body slows down.

Now replacing:

0 = 10 - (a*25)

a = 0.4 [m/s^2]

Now we must find the displacement value with the following equation and with the acceleration value found.

\(v_{f} ^{2} = v_{i} ^{2}-(2*a*x)\)

where:

x = displacement [m]

(10)^2 = 2*0.4*x

x = 125 [m]

See screen shot...momentum in collision

See screen shot...momentum in collision

Answers

Please find attached photographs for your answer.

Hope it helps.

Do comment if you have any query.

See screen shot...momentum in collision
See screen shot...momentum in collision

Question 23 of 32
Two pistons are in an enclosed volume with fluid in between them, such that
movement in one piston affects the location of the other piston, as shown in
the image below. If an explosion occurs in the piston on the left such that it
moves 0.2 m, what is the distance that the piston on the right will move
(assuming that friction can be neglected)? (Recall that work on an object is
equal to the force on the object times the distance it is moved, and that work
is conserved.)
Cross-sectional area = 0.25 m²
Cross-sectional area = 0.5 m²
OA. 0.1 m
OB. 0.2 m
OC. 0.8 m
D. 0.4 m

Answers

The correct answer for the given question for the distance that the piston on the right will move is 0.1 m option (A).

When an explosion occurs in the left piston, it exerts a force on the fluid, which in turn exerts an equal and opposite force on the right piston due to the enclosed volume.

The cross-sectional area of the left piston is 0.25 m², and assuming the force is uniformly distributed over the entire area, the force exerted by the left piston is given by F = P × A, where P is the pressure and A is the area.

Using the work-energy principle, the work done by the left piston is equal to the work done on the right piston. Therefore, the work done on the right piston is equal to the force exerted on it multiplied by the distance it moves.

The force exerted on the right piston can be calculated using the same formula as before (F = P × A), where the cross-sectional area A is 0.5 m².

Since the force exerted on the right piston is equal to the force exerted by the left piston, we can equate the two expressions for force and solve for the distance moved by the right piston.

Using the equation F_left = F_right, we have P_left × A_left = P_right × A_right.

Plugging in the given values, we get (P_left × 0.25) = (P_right × 0.5).

Since the pressure is the same throughout the fluid, P_left = P_right.

Simplifying the equation, we have 0.25 = (0.5 × A_right).

Solving for A_right, we get A_right = 0.25 / 0.5 = 0.5 m².

The distance moved by the right piston can be calculated using the work formula:

Work_right = Force_right × Distance_right.

Plugging in the values, we have (P_right × A_right) × Distance_right = (P_left × A_left) × Distance_left.

Since P_left = P_right, we can further simplify the equation:

A_right × Distance_right = A_left × Distance_left.

Plugging in the given values, we get (0.5 × Distance_right) = (0.25 × 0.2).

Solving for Distance_right, we have Distance_right = (0.25 × 0.2) / 0.5 = 0.1 m.

Hence, the correct answer is option A: 0.1 m.

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The ideal body position for your legs after you adjusted Seat is with your knee

Answers

The ideal body position while driving is with the knee slightly bent from the seat while pressing the pedals. The best choice is therefore B.

What significance does proper body posture have?

The right blood flow, which supports and maintains the health of the muscles, tendons, and ligaments, depends on the body's posture.

The picture that is attached contains the entire question.The right body alignment to choose while driving aids in the development of the right control over the vehicle. When pressing the pedals, the knee should be slightly bent and the seat should be adjusted such that the bottom touches the back of the seat. So, choice B is the right one.

The ideal body position for your legs after you adjusted Seat is with your knee

A. is fully tucked in when pressing the pedals

B. is slightly crooked when pressing the pedals

C. is fully extended when pressing the pedals

D. is pressing directly on the pedals

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Imagine diving 150 feet beneath the sea. You are looking for sponges, which is not very exciting, but it’s your job. Now imagine coming across the wreck of an ancient ship! That’s what happened to some divers off the island of Antikythera (an-tee-KITH-er-ah) in the Mediterranean Sea. The ship had been on the seafloor for almost 2000 years. Divers found coins, statues, musical instruments, and many other precious items in the shipwreck. The greatest treasure of all, however, was a collection of corroded metal gears. Nothing like them had ever been found before or has ever been found since. They seem to fit together in a complicated way. They are part of a machine that scientists call the Antikythera mechanism.
It took scientists many years to figure out what the mysterious machine was for. Eventually, scientists used x-rays to view the gears and other parts inside the machine. They were also able to read ancient Greek writing on some of the parts. Using this new information, scientists realized the Antikythera mechanism was built by ancient astronomers to predict patterns in the appearance of the sun, the planets that people were able to observe, and especially the Moon.
Ancient Greek astronomers had been observing the Moon and keeping track of its appearance for hundreds of years. Looking over all their observations, they noticed patterns. The astronomers assumed the same patterns that had been going on for hundreds of years would keep going into the future. They built the Antikythera mechanism to predict events in the future based on the patterns they had observed.
A user of the Antikythera mechanism could turn a dial on one side of the mechanism to choose a date and time, either in the past or in the future. The gears would spin into place, predicting the appearance and position of the Moon and other bodies at that time. The machine had pointers and other displays to show its predictions. For example, ancient astronomers knew there would be a full moon every 29 and a half days. There was a ball on the Antikythera mechanism that traced the phases of the moon. The ball was white on one side (representing the side of the moon illuminated by the sun) and black on the other (representing the dark side of the moon). As the user turned the date dial of the machine, the little moon ball would spin to show what phase the moon would be in on that date.
The Antikythera mechanism also traced patterns that took much longer to repeat. For instance, ancient astronomers knew that occasionally, on the night of a full moon, a lunar eclipse happens. During a lunar eclipse, the fully illuminated face of the full moon goes dark for a time. However, they noticed that this didn’t happen every full moon—in fact, over a year would sometimes pass between their observations of lunar eclipses. Through careful record-keeping, the ancient astronomers realized that eclipses, although rare, happened in patterns. They kept track of the patterns and recorded that knowledge in the workings of the Antikythera mechanism. As a user turned the date dial of the Antikythera mechanism, the mechanism counted the days and displayed exactly when people in Greece could expect to observe a lunar eclipse.
The mechanism showed WHEN an eclipse would happen, but it didn’t show WHY an eclipse would happen. The astronomers who made the Antikythera mechanism knew that the Moon seems to shine because it is illuminated by light from the sun. They also knew that an eclipse of the Moon happens when Earth blocks the sunlight and makes a shadow on the Moon. They did not know exactly why this happened at some times and not others.
Today astronomers can explain why lunar eclipses happen when they do. Lunar eclipses are caused by Earth blocking sunlight from reaching the Moon. For Earth to block the sunlight, it has to be between the sun and the Moon. Not only that, but the sun, Earth, and the Moon have to line up exactly, with Earth in the middle. When they line up in this way, Earth blocks the sunlight and the Moon goes dark. Eclipses only happen on the night of a full moon, because the full moon is the phase when the sun, Earth, and the Moon line up with Earth in the middle.

If this is true, why don’t lunar eclipses happen every time the Moon is full? Why did the ancient astronomers have to wait so long between observations of eclipses? It’s because the Moon’s orbit around Earth is slightly tilted out of alignment. During most full moons, the sun, Earth, and the Moon are lined up, but they are not lined up EXACTLY. For the three bodies to line up exactly, the Moon has to be exactly in the right spot on its tilted orbit. That happens very infrequently. The makers of the Antikythera mechanism knew how unusual this was, but they didn’t understand the reason—now you do!

1) Describe how it is possible for Lunar Eclipses to happen. Use evidence from the reading to explain how this happens.

2) Describe the main factor that leads to a lunar eclipse instead of a full moon.

Answers

Answer:

A lunar eclipse occurs when the Moon moves into the Earth's shadow. ... The only light reflected from the lunar surface has been refracted by Earth's atmosphere. This light appears reddish for the same reason that a sunset or sunrise does: the Rayleigh scattering of bluer light.

Lunar eclipses can only happen when the Moon is opposite the Sun in the sky, a monthly occurrence we know as a full Moon. But lunar eclipses do not occur every month because the Moon's orbit is tilted five degrees from Earth's orbit around the Sun. Without the tilt, lunar eclipses would occur every month.

Explanation:

When a 5 kg rock is dropped from a height of 6 m on Planet X, it loses 24 J of GPE. What is the acceleration due to gravity on Planet X?

Answers

Answer:

g = 1.25m/s²

Explanation:

Given the following data;

Mass = 5kg

Height = 6m

Gravitational potential energy = 24J

To find the acceleration due to gravity;

Potential energy can be defined as an energy possessed by an object or body due to its position.

Mathematically, potential energy is given by the formula;

\( P.E = mgh\)

Where,

P.E represents potential energy measured in Joules.

m represents the mass of an object.

g represents acceleration due to gravity measured in meters per seconds square.

h represents the height measured in meters.

GPE = mgh

Substituting into the equation, we have;

24 = 5*6*g

24 = 30g

g = 30/24

g = 1.25m/s²

Therefore, the acceleration due to gravity on Planet X is 1.25m/s².

Answer:

g=0.8m/s^2

Explanation:

M=5kg

h=6m

GPE=24J

GPE=Mgh

g=GPE/Mh

g=24J/(5kg)(6m)=0.8

g=0.8m/s^2

Obviously, everybody has different skill sets. The goal of this lesson is not to become an Olympic volleyball player. Instead, it is to learn/improve some basic volleyball skills. For this assessment, you should experiment with your passing, serving, and setting. (Perhaps the local YMCA has pick-up volleyball games in which you could participate.)

After you have practiced each of these three skills, respond to the following questions in writing, for each of the three skills. Your essay should be at least 200 words.

What did you find most challenging about mastering this skill? Why?
What did you find easiest about mastering this skill? Why?
clearly demonstrate that you understand the discreet steps of the skills;
specify individual steps that you found both challenging and easy;
demonstrate your ability to effectively reflect on your own athletic abilities; and
be at least one paragraph,

Answers

'What did you find most challenging about mastering this skill?'

Ahh- What I found most challenging about the passing skill is hitting the ball the right direction. The last time I tried to pass the ball it hit someone in the face. But when I got a hang of it, It was easy until middle game. I tried to hit the ball and I faceplanted into the bar..-

'What did you find easiest about mastering this skill?'

The easiest? Well for me, nothing was easy. I couldn't even serve the ball without hitting it thw wrong direction!! I can't serve or pass a ball without it going the wrong direction or the ball hitting someone in the face! It gotten easier and easier as the game went particuallarly well. My team did end up winning thanks to one of my teammates. I can't play volleyball well at all. It was easy in some cases but hard at the same time.

Hope this helps you! :)

Answer:

Explanation:

This is not exactly Physics but here you go:

What did you find most challenging about mastering this skill? Why?

Setting is the most challenging because it requires many different techniques. There is a designated setter in competition games exactly because it is the most challenging position. It also requires lot of practices with your teammates.

What did you find easiest about mastering this skill? Why?

Serving is the easiest because you literally have the ball in your hand when you serve. Now it is not as easy if you want to make a serve that is difficult to receive. When a player fails to serve, it is usually not because it is tough but rather the player is trying to make a hard or spinning serve.

I am not particularly athletic and above is from a little play time I have had with volley ball in high school.

describe periscope. ​

Answers

Answer:

periscope, an optical instrument used in land and sea warfare, submarine navigation, and elsewhere to enable an observer to see his surroundings while remaining under cover, behind armor, or submerged.

Explanation:

Explain the meaning and use of the following acronyms: HELIOS, Exo-FMS, HAZMAT, NIRSpec.​

Answers

Answer:

HELIOS- The god of the sun in

HAZMAT-Hazardous materials

NIRSpec- Near Infrared Spectrograph

Explanation:

The acronyms will be:

HELIOS: personification of the SunExo-FMS: EXO flexible manufacturing ystemHAZMAT: hazardous materialsNIRSpec.: Near-infrared spectroscopy

How to explain the acronyms?

HAZMAT is an abbreviation for “hazardous material that is the substances in quantities or forms that may pose a reasonable risk to health, property, or the environment.

Near-infrared spectroscopy (NIRS) is a brain imaging method that measures light absorbance to calculate oxy-hemoglobin (oxy-HB) and deoxy-hemoglobin.

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Much of the solar wind comes from ___ where the magnetic fields does not loop back into the sun. a. prominences b. coronal holes c. spicules d. granulation

Answers

Much of the solar wind comes from coronal holes where the magnetic fields does not loop back into the sun.

Much of the solar wind comes from these areas on the sun where the magnetic fields do not loop back into the sun. Coronal holes are regions of the corona, which is the outermost layer of the sun's atmosphere, that appear dark in X-ray and ultraviolet images. This is because they are cooler and less dense than the surrounding plasma.

Coronal holes are also associated with high-speed solar winds that can have significant impacts on space weather and Earth's magnetic environment. When these winds interact with Earth's magnetic field, they can cause auroras, disrupt satellite communications, and even damage power grids. Understanding the origins and behavior of coronal holes is therefore an important area of research in solar physics and space weather forecasting.

Overall, coronal holes are a fascinating and important feature of the sun that play a key role in shaping the space environment around our planet. By studying these regions and their associated solar wind, scientists can better predict and mitigate the impacts of space weather on our technology and infrastructure.

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the speed of an electron is known to be between 5.0×106 m/s and 5.3×106 m/s . estimate the uncertainty in its position.

Answers

We can estimate the uncertainty in the electron's position based on the range of its speed. we can calculate the minimum uncertainty in the electron's position: Δx ≥ (1.054 × 10^(-34) J·s) / (5.3×10^6 m/s - 5.0×10^6 m/s).

(A) The uncertainty principle, formulated by Werner Heisenberg, states that it is impossible to simultaneously know the precise position and momentum of a particle with absolute certainty. Therefore, we can estimate the uncertainty in the electron's position based on the range of its speed.

(B) To estimate the uncertainty in the electron's position, we can apply the uncertainty principle. According to the principle, the product of the uncertainties in position (Δx) and momentum (Δp) must be greater than or equal to a certain value known as the reduced Planck's constant (ħ):

Δx * Δp ≥ ħ

Given that the electron's speed ranges from 5.0×10^6 m/s to 5.3×10^6 m/s, we can consider this range as the uncertainty in its momentum (Δp). Now, we can rearrange the equation to solve for the uncertainty in position (Δx):

Δx ≥ ħ / Δp

Substituting the value of reduced Planck's constant (ħ ≈ 1.054 × 10^(-34) J·s) and the range of momentum (Δp = 5.3×10^6 m/s - 5.0×10^6 m/s), we can calculate the minimum uncertainty in the electron's position:

Δx ≥ (1.054 × 10^(-34) J·s) / (5.3×10^6 m/s - 5.0×10^6 m/s)

Calculating this value gives us the estimated uncertainty in the electron's position.

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Use the example of the two soccer players in the ball suits to explain Newton's
third law.

Answers

Answer:

Newton's third law states that " for every action, there is an equal and opposite reaction". In soccer, when you kick the soccer ball you will feel the force of the kick back into your leg. You won't feel the force as much because your legs have more mass than the soccer ball.

The university of the English institute

a rectangular block has amass of 60 kg and sides 2mx1mx3mx ij g=10m/s then what is the minimum pressure that is it can exert as it rest on a surface
A.100pa
B.200pa
C.50pa
D.300pa​

Answers

Answer: A) 100 pa

==============================================

Explanation:

The largest face of this rectangular block is 2*3 = 6 square meters. You simply pick the two largest sides and multiply them to get the largest area.

Pressure is defined as the force divided by area. The larger the area gets, the smaller the pressure will be. This is because the pressure is spread out over more area to reduce the per square unit pressure amount.

The block is 60 kg and the acceleration of gravity is roughly 10 m/s^2

So the force pulling down on the block is roughly 60*10 = 600 newtons.

Now we can find the pressure

P = pressure = unknown

F = force = 600 N

A = area = 6 square m

P = F/A

P = (600 N)/(6 m^2)

P = 100 (N/m^2)

P = 100 pa

Where "pa" stands for the unit "pascals", which is one unit for pressure.

--------------

Note what happens when we make A as small as possible. That happens with the 1 by 2 side, so the area is A = 1*2 = 2, and we get

P = F/A = 600/2 = 300 pascals

Reducing A enlarges P. Consequently, minimizing A leads to maximizing P. So the max pressure occurs on the face that is 1 m by 2 m.

Select the correct anwer from each drop-down menu. When a looe brick i reting on a wall, it ha
[ Select ]
(. )kinetic (. )potential (. )both kinetic and potential energy. When the brick i puhed off the wall and i falling down, the amount of
[ Select ]
(. )kinetic (. )potential (. )both kinetic and potential energy i decreaing while the amount of
[ Select ]
(. )kinetic (. )potential (. )both kinetic and potential energy i increaing

Answers

When a loose brick is resting on a wall, it has potential energy. When the brick is pushed off the wall and is falling down, the amount of potential energy is decreasing while the amount of kinetic energy is increasing.

Kinetic energy is motion––of waves, electrons, atoms, molecules, substances, and objects. Potential energy is stored energy and the energy of position––gravitational energy. There are several forms of potential energy.

Conservation of energy is not saving energy. The law of conservation of energy says that energy is neither created nor destroyed. When we use energy, it doesn’t disappear. We change it from one form of energy into another.

A car engine burns gasoline, converting the chemical energy in gasoline into mechanical energy. Solar cells change radiant energy into electrical energy. Energy changes form, but the total amount of energy in the universe stays the same.

Energy efficiency is the amount of useful energy you get from a system. A perfect, energy-efficient machine would change all the energy put in it into useful work—an impossible dream. Converting one form of energy into another form always involves a loss of usable energy.

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the speed of light in sapphire is 1.69 x 10^8 m/s. determine the index of refraction for sapphire.​

Answers

Answer:

1.775 is the answer

Explanation:

We can figure out the index of refraction of the sapphire by using the following equation n = c/v

n  =  index of refraction

c  =  speed of light in a vacuum

v  =  speed of light traveling in medium

Step 1 :

v = 1.69 × 10^8

c = 3 × 10^8

Step2: Substitute values

n = c/v -----> n = 3 × 10^8 / 1.69 × 10^8 = 3/1.69 = 1.775

Index of refraction of sapphire is 1.775

. On wet roads, motorcyclists should ride in the wheel tracks of the vehicle directly in front of them. A. True B. False

Answers

It is True. Motorcyclists should ride in the wheel tracks of the vehicle directly in front of them on wet roads.

This is because the water will be pooled between these tracks, leaving less water on the tire and allowing better contact with the road surface, which is important for maintaining traction, stability and control. True, motorcyclists should ride in the wheel tracks of the vehicle directly in front of them on wet roads. Motorcyclists should maintain a safe distance and speed from the vehicle in front of them to avoid collisions or accidents on the road. By doing this, the motorcycle will have a better grip on the wet surface of the road, which will help in maintaining control on the motorcycle.

When driving on wet roads, motorcyclists should ride in the wheel tracks of the vehicle directly in front of them. By doing this, the motorcycle has better contact with the road surface, which will help in maintaining traction, stability and control. It is important for motorcyclists to maintain a safe distance and speed from the vehicle in front of them to avoid any collisions or accidents on the road.

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how do advancements in technology help to advance scientific knowledge

Answers

Technology and science support one another's advancement. New technologies are developed using scientific knowledge. New technology frequently enable scientists to examine nature in novel ways and generate novel findings.

How might a shift in technology impact scientific understanding?

By introducing a new area of scientific inquiry, a change in technology can have an impact on our understanding of science. For instance, the development of the microscope allowed biologists to study species that were invisible to the eye, resulting in the development of the field of microbiology.

How are scientific knowledge and technology related?

Building new technologies with the use of scientific information frequently leads to new observations being made about the world, which in turn leads to the development of even more scientific knowledge.

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