how fast must a plane fly along the earth's equator so that the sun stands still relative to the passengers? the earth's radius is 6400 km.
Answers
To calculate the speed at which a plane must fly along the Earth's equator for the sun to appear stationary relative to the passengers, we need to consider the rotation of the Earth.
The Earth completes one full rotation in approximately 24 hours. Therefore, in 24 hours, a point on the equator travels the full circumference of a circle with a radius equal to the Earth's radius.
The formula for the circumference of a circle is given by:
Circumference = 2 * π * radius
Substituting the Earth's radius (6400 km) into the formula, we have:
Circumference = 2 * π * 6400 km
To find the speed required for the sun to appear stationary, we divide the circumference by the time it takes for one full rotation (24 hours or 86400 seconds):
Speed = Circumference / Time
Speed = (2 * π * 6400 km) / 86400 s
Simplifying the equation:
Speed ≈ 465.1 m/s
Therefore, the plane must fly at approximately 465.1 meters per second (m/s) along the Earth's equator for the sun to appear stationary relative to the passengers.
The earth rotates once every 24 hours, which means that its equator moves at a rate of 40,000 kilometers (24,855 miles) per day, or about 1670 kilometers per hour. Therefore, if an airplane flies at the same speed as the earth's rotation, the sun will appear to be stationary relative to the passengers.
To maintain a stationary position relative to the sun, an airplane would have to fly at a speed equal to the rotational velocity of the earth, which is around 1670 kilometers per hour. This is because the sun appears to be stationary relative to the earth because both the sun and the earth are moving in a circle at the same rate.
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Related Questions
6.
Ethan learned that astronomers use satellites to study the Universe. Which of the following
statements describes how another type of scientist can use satellites in their related field?
A. Volcanologist use satellites study the Earth's core.
B. Biologists use satellites to study the development of large weather systems, like
hurricanes
c. Due to the heavy tree cover, geologist use satellites to study animal behavior in the
amazon.
D. Due to the remoteness and darkness of the polar regions, climatologist use satellites to
collect data on climate change.
Answers
Answer:
D
Explanation:
the question says "in their related field" so only D makes sense
a paramecium is covered with motile hairs called cilia that propel it at a speed of 1 mm/s.
Answers
The speed of paramecium is given. The de-Broglie's wavelength of the particle is 3.313 × 10⁻²¹ m.
Given that, the speed of paramecium v = 1 mm/s = 1 × 10⁻³ m/s
Volume of paramecium = 2× 10⁻¹³ m³
Density of paramecium = 1000 kg/m³
Mass of paramecium is given by the formula, m = ρ v
⇒ 1000 × 2× 10⁻¹³ = 2× 10⁻¹⁰ kg
The de-Broglie's wavelength of the particle is,
λ = h/p = h/mv = (6.626 × 10⁻³⁴)/[2× 10⁻¹⁰ × 10⁻³] = 3.313 × 10⁻²¹ m
where, h is plank's constant
p is momentum
Thus, the required de-Broglie's wavelength of the particle is 3.313 × 10⁻²¹ m.
The question is incomplete. The complete question is 'If the paramecium has a volume of 2E-13m³ and a density equal that of water, what is the de-Brogile wavelength when in motion?
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An airplane is flying at a constant speed along with a constant height of 3 km that will take it directly over an observer at ground level. At a given instant, the observer notes that the angle between him and the airplane is 3π and is increasing at 201 radians per second. Find the speed of the airplane, in km/hr. b. Continue as part (a), if the airplane comes towards the observer at a constant angular rate of change 201, what is the speed of the airplane when it is directly over the head of the observer? c. Is the airplane slowing down or speeding up as it approaches the observer? Justify your conclusion.
Answers
A- The speed of the airplane is approximately 201 km/hr.
b. The speed of the airplane when directly over the observer is approximately ∞ km/hr.
c. The airplane is slowing down as it approaches the observer.
a. To find the speed of the airplane:
dx/dt = (1 + tan²(θ)) * dθ/dt
At θ = 3π, tan(3π) = 0, so:
dx/dt = (1 + 0²) * 201
dx/dt = 201 km/hr
b. To find the speed of the airplane when directly over the observer:
dx/dt = (1 + tan²(θ)) * dθ/dt
Taking the limit as θ approaches π/2 from below:
lim(θ→π/2-) (1 + tan²(θ)) = ∞
So the speed of the airplane is approximately ∞ km/hr.
c. We can observe from the rate of change equation dx/dt = (1 + tan²(θ)) * dθ/dt that the speed of the airplane, dx/dt, is directly dependent on the rate of change of the angle, dθ/dt. In this case, the rate of change of the angle is given as 201 radians per second.
Since the rate of change of the angle, dθ/dt, is positive and constant, we can conclude that the speed of the airplane, dx/dt, will also be positive and constant. This means that the airplane is moving forward at a constant speed.
As the airplane approaches the observer, the angle θ decreases, which implies that tan(θ) also decreases. Since the speed of the airplane is directly proportional to (1 + tan²(θ)), which is decreasing as θ decreases, the speed of the airplane gradually decreases.
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Draw a circuit in series, 6 lamps, 3 electrical equipment, 1 power source, open
Answers
3 electrical equipments consider for this circuit diagram are,
1. Ammeter
2. Resistance
3. Resistance
The circuit diagram with 6 lamps and 3 electrical equipments and 1 power source with open circuit form is represented as,
Given the impulse acting on an object and the impact time which equation can be used to calculate the force applied to an object
Answers
Answer is D
Ndmdjdndbdjdkskd
The impulse acting on an object and the impact time, the equation F= I / Δt can be used to calculate the force applied to an object, therefore the correct answer is D.
What is impulse?The product of the average applied force and the time for which it is exerted is known as an impulse.
the mathematical relation for impulse is
Impulse = F * Δt
where F represents the force applied and Δt represents the time for which the force is applied
Thus, the correct equation that can be used to calculate the force applied to an object is F = I /Δt and the correct option is D.
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Is the torque the product of force and lever arm?
Answers
Lever arm length and force applied perpendicular to a lever arm are multiplied to create torque. A scalar quantity called torque has two possible directions: clockwise and counterclockwise.
What is the force times the lever arm's product?A force applied perpendicular to a lever arm produces a torque, which is the result. The distance that runs perpendicularly from the pivot point, or the center of rotation, to the location where the force is delivered, is known as the lever arm or moment arm. A pivot point is always used to define a torque.
How do you multiply torque?Each gearing stage of a torque multiplier amplifies the torque applied to the bolt. For instance, a torque multiplier with a 5:1 ratio will produce an output at the shaft that is five times the torque, but because no energy can be produced, the speed will only be one fifth of the original.
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6. Abdul moves a magnetic toy train away from a magnet that cannot move. What happens to the
potential energy in the system of magnets during the movement?
a
The potential energy decreases because the train moves in the same direction as the
magnetic force.
b
The potential energy decreases because the train moves against the magnetic force.
С
The potential energy increases because the train moves against the magnetic force.
d
The potential energy does not change because the magnets in the system do not change.
Yeah
Answers
Answer: Potential energy increases because the train moves against the magnetic force.
Explanation:
When the magnetic toy train is moved away from a magnet that cannot move, the potential energy in the system of magnets during the movement is affected as there's an increase in the potential energy because the train moves against the magnetic force.
We should note that the potential energy simply means the energy that is stored in the magnetic toy. Since the magnetic toy has been moved away from the magnet, the likelihood of its attraction will reduce thereby there'll be a rise in the potential energy.
How do I find average velocity and average time
Answers
Answer:
x2- x1 / t2 - t1
Explanation:
To find this speed, you have to use the operation of: X2 -X1/ t2 -t1, we know that x is the distance, we do the operation and that would be our average speed
A light bulb for use with the 220 V mains is rated at 100 W.
(a) What current will flow through the bulb?
(b) If the bulb converts 20% of the energy to light, how much light energy is produced per second?
Answers
Answer:
So, 20W of light energy is produced per second.
Explanation:
a) To calculate the current flowing through the bulb, we use the formula:
I = P / V
Where P is the power in watts (100 W) and V is the voltage (220 V).
I = 100 / 220 = 0.45 A
b) To find the light energy produced per second, we use the formula:
E = P x t
Where P is the power in watts (100 W) and t is the time in seconds.
As we know only the power and not the time, we have to calculate the energy efficiency of the bulb.
Efficiency = (Energy output/ Energy input) * 100
Efficiency = (Light energy output / Total energy input) * 100
Let's assume that the bulb is on for 1 sec
Efficiency = (Light energy output / 100W) * 100
Light energy output = (Efficiency / 100) * 100W = 20W
Efficiency = 20%
So, 20W of light energy is produced per second.
Answer:
So, 20W of light energy is produced per second.
Explanation:
a) To calculate the current flowing through the bulb, we use the formula:
I = P / V
Where P is the power in watts (100 W) and V is the voltage (220 V).
I = 100 / 220 = 0.45 A
b) To find the light energy produced per second, we use the formula:
E = P x t
Where P is the power in watts (100 W) and t is the time in seconds.
As we know only the power and not the time, we have to calculate the energy efficiency of the bulb.
Efficiency = (Energy output/ Energy input) * 100
Efficiency = (Light energy output / Total energy input) * 100
Let's assume that the bulb is on for 1 sec
Efficiency = (Light energy output / 100W) * 100
Light energy output = (Efficiency / 100) * 100W = 20W
Efficiency = 20%
So, 20W of light energy is produced per second.
Assume a simply supported beam with span of 15m. It will be exposed to a dead load of 20kN/m (including self-weight) and a live load of 2kN/m along the full span. At the same time, it will be experiencing a concentrated dead load of 23kN + a live load of 1kN at midspan, as well as an additional dead load of 15kN located at 4m from the right support.
The beam has a rectangular cross-section with a width of 600mm and total height of 1000mm. The beam is reinforced with 10- 25M tensions bars at effective depth of 920 mm. The maximum aggregate size used is 20mm, and has the following material properties: f’c = 25MPa ,fy = 400 MPa.
Please perform the following task:
1) Draw the governing shear and bending moment diagram for the factored load.
2) Calculate the moment resistance of the cross section.
3) Comment if this cross section is adequately designed to resist the factored bending moment. (LRFD)
Answers
The values of all sub-parts have been obtained.
(1). The maximum factored load the beam can withstand is 45.2 kN/m.
(2). The moment resistance of the cross-section is 291735.65 Nm.
(3). The factored moment demand is 27939.6 Nm
1) To draw the governing shear and bending moment diagram for the factored load, we need to first calculate the maximum factored load that the beam can withstand.
The maximum factored load on the beam is given by:
Dead Load = 20 kN/m + 15 kN
= 35 kN/m.
Live Load = 2 kN/m + 1 kN
= 3 kN/m.
Total Factored Load = 1.2 x Dead Load + 1.6 x Live Load
= 1.2 x 35 kN/m + 1.6 x 3 kN/m
= 45.2 kN/m.
The maximum factored load the beam can withstand is 45.2 kN/m.
The shear force and bending moment diagrams for the given factored load can be obtained as shown below:
Shear Force Diagram:
Bending Moment Diagram:
2) To calculate the moment resistance of the cross-section, we can use the formula:
MR = σst A'(d - a/2) + 0.85f'c A''(d - a/2)
Where, σst = yield stress of tension steel [σst = fy / γst],
γst = safety factor for tension steel [γst = 1.15A']
A' = area of tension steel, [A'' = b(d - a)].
Where,
b = width of the beam [b = 600 mm],
d = total height of the beam [d= 1000 mm],
a = effective depth of tension steel [a = 920 mm]
f'c = compressive strength of concrete [f'c = 25 MPa],
MR = σst A'(d - a/2) + 0.85f'c A''(d - a/2)
MR = (400 / 1.15) x 10 x (1000 - 920/2) + 0.85 x 25 x 590 x (1000 - 920/2)
MR = 291735.65 Nm
The moment resistance of the cross-section is 291735.65 Nm.
3) To check if this cross-section is adequately designed to resist the factored bending moment (LRFD), we need to calculate the factored moment demand and compare it with the moment resistance.
The factored moment demand is given by:
MF = ϕ x Mu
Where,ϕ = resistance factor = 0.9, Mu = factored bending moment
Mu = 1.2 x Dead Load x L2 / 8 + 1.6 x Live Load x L2 / 8 + 1.2 x (Dead Load + Live Load) x L2 / 2
= 1.2 x 35 x 152 / 8 + 1.6 x 3 x 152 / 8 + 1.2 x 38 x 152 / 2
= 31044 Nm
MF = ϕ x Mu
= 0.9 x 31044
= 27939.6 Nm
The factored moment demand is 27939.6 Nm, which is less than the moment resistance of the cross-section, i.e., 291735.65 Nm.
Therefore, this cross-section is adequately designed to resist the factored bending moment.
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The equation for free fall at the surface of some planet (s in meters, t in seconds) is s=1.33t^(2). How long does it take a rock falling from rest to reach a velocity of 27.2(m)/(s) on this planet?
Answers
To increase the boiling temperature of 2051 g of water by 1.500 °C, approximately 3.431 grams of NaCl would need to be added.
Explanation:
The boiling point elevation is determined by the molality of the solute in the solution. The equation for boiling point elevation is:
ΔTb = Kb * m
Where:
ΔTb is the boiling point elevation,
Kb is the boiling point elevation constant for water (0.5100 °C/m),
m is the molality of the solute.
To calculate the molality, we can use the formula:
m = (moles of solute) / (mass of solvent in kg)
Given that we want to increase the boiling temperature by 1.500 °C, and the Kb value is 0.5100 °C/m, we can rearrange the equation to solve for the molality:
m = ΔTb / Kb
m = 1.500 °C / 0.5100 °C/m
m ≈ 2.941 m
To convert molality to mass, we need to know the molecular weight of NaCl. The molecular weight of NaCl is approximately 58.44 g/mol.
Using the formula:
mass of solute = molality * molecular weight of solute * mass of solvent in kg
mass of solute = 2.941 m * 58.44 g/mol * 2.051 kg
mass of solute ≈ 3.431 g
Therefore, approximately 3.431 grams of NaCl would need to be added to 2051 g of water to increase the boiling temperature of the solution by 1.500 °C.
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The equation for free fall at the surface of some planet (s in meters, t in seconds) is s=1.33t^(2), the long it take a rock falling from rest to reach a velocity of 27.2(m)/(s) on this planet is 1.414 seconds.
Free fall is a type of movement that an object undergoes when it falls freely under the effect of gravity. Gravity is a force that acts on every object and makes it move towards the center of the earth or any other celestial body. The acceleration due to gravity is expressed as g, and it is equal to 9.8 m/s² on earth. The time it takes a rock falling from rest to reach a velocity of 27.2 m/s on this planet can be calculated by equating the acceleration due to gravity with the given velocity.
The formula for velocity is given by V=U+at, where V is the final velocity, U is the initial velocity, a is the acceleration, and t is the time taken to reach the final velocity. Under free fall, the initial velocity is zero; therefore, the formula can be simplified to V = at.
Substituting the given values in the formula, we get 27.2=1.33t² × g or 27.2=1.33t² × 9.8.
We can simplify this equation to t² = (27.2)/(1.33 × 9.8) or t² = 2.
The square root of 2 is 1.414. Therefore, the time taken for the rock to reach a velocity of 27.2 m/s on this planet is 1.414 seconds.
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i-10 presumes a cause-and-effect relationship between hypertension and acute kidney disease.
Answers
I-10 (International Classification of Diseases, 10th Revision) is a medical classification system used by healthcare providers and researchers to classify and code diseases and health conditions. In this system, hypertension (high blood pressure) and acute kidney disease are two separate diagnoses that can be coded independently.
While hypertension is a known risk factor for developing kidney disease, it is not necessarily a direct cause of acute kidney disease. Acute kidney disease can have various causes, including infections, medication toxicity, and decreased blood flow to the kidneys. Hypertension can contribute to the development of chronic kidney disease over time, but it may not directly cause acute kidney injury.
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List three conditions for current to flow in a circuit.
Answers
A 10 kg mass is held in equilibrium by two cables (shown in red). The mass is centered within the 4.0 m horizontal dimension. If h2 = 2 find the tension in the cables.
Answers
The tension in each cable is approximately 49 N.
To find the tension in the cables, we can analyze the forces acting on the 10 kg mass in equilibrium. Since the mass is centered within the 4.0 m horizontal dimension, we can assume that the tension in each cable is equal.
Let's denote the tension in each cable as T. Since the mass is in equilibrium, the sum of the vertical forces acting on it must be zero.
Considering the vertical forces, we have:
T - T - mg = 0
Since the tension in each cable is equal and directed upwards, the vertical components cancel each other out. Therefore, we can rewrite the equation as:
-2T - mg = 0
We know that the mass (m) is 10 kg and the acceleration due to gravity (g) is approximately 9.8 m/s^2. Substituting these values into the equation, we get:
-2T - (10 kg)(9.8 m/s^2) = 0
Simplifying the equation, we have:
-2T - 98 N = 0
To solve for T, we isolate it on one side of the equation:
-2T = 98 N
T = 98 N / -2
T ≈ -49 N
The negative sign indicates that the tension in the cables is directed downward. However, tension is typically considered a positive quantity, so we can take the absolute value to obtain the magnitude of the tension.
Therefore, the tension in each cable is 49 N.
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What are the 7 steps of scientific method in order?
Answers
Answer:
1. Make an observation or ask a question.
2. Gather background information.
3. Create a hypothesis.
4. Create a prediction and perform a test.
5. Analyze the results and draw a conclusion.
6. Share the conclusion or decide what question to ask next.
7. Document the results of your experiment.
Hope this helps!
Seven scientific methods are observation, research, hypothesis, experimentation, data collection, result, conclusion and note.
What are the steps of scientific method ?Observation: Observe and identify a problem or question to be solved.
Research: Research and gather information and background knowledge on the problem.
Hypothesis: Develop a possible solution or explanation (hypothesis) for the problem.
Experimentation: Plan and conduct experiments to test the hypothesis.
Data Collection: Collect and analyze data from the experiments.
Results: Interpret and analyze the results to determine if the hypothesis was supported or rejected.
Conclusion: Draw a conclusion and make a statement about the problem based on the evidence collected during the experiments.
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The amount of lateral strain in a tension member can be calculated using OA the coeficient of expansion B the moment of inertia OCthe yield stress OD Poisson's rati
Answers
The amount of lateral strain in a tension member can be calculated using Poisson's ratio.
To calculate the lateral strain, we can use the equation: ε_lateral = -ν * ε_longitudinal
Where:
ε_lateral = Lateral strain
ν = Poisson's ratio
ε_longitudinal = Longitudinal strain
Poisson's ratio (ν) is a material property that describes the ratio of lateral strain to longitudinal strain when a material is subjected to an axial load. It is defined as the negative ratio of the transverse strain to the longitudinal strain.
Calculating the lateral strain involves determining the longitudinal strain, which can be calculated using the equation:ε_longitudinal = ΔL / L
Where:
ε_longitudinal = Longitudinal strain
ΔL = Change in length of the tension member
L = Original length of the tension member
Once the longitudinal strain is calculated, we can use Poisson's ratio to determine the lateral strain by multiplying the longitudinal strain by the negative value of Poisson's ratio.
It is important to note that the lateral strain is typically very small compared to the longitudinal strain in a tension member, especially for materials with a low Poisson's ratio.
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a 2.0 kg-ball moving at 3.0 m/s perpendicular to a wall rebounds from the wall at 2.5 m/s. the change in the momentum of the ball is ______ (units in kg m/s)
Answers
After considering the given data and performing set of calculations we conclude that the change in the momentum of the ball is 11 kg m/s.
To evaluate the change in momentum of the ball, we can apply the following equation which was derived keeping the principles of momentum into consideration
\(\Delta p = m * \Delta v\)
Here,
Δp =change in momentum,
m = mass of the ball (2.0 kg),
Δv = change in velocity (2.5 m/s - (-3.0 m/s) = 5.5 m/s).
Staging in the values, we get:
\(\Delta p = 2.0 kg * 5.5 m/s = 11 kg m/s\)
Hence, the change in momentum of the ball is 11 kg m/s.
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An astronaut in the space shuttle is orbiting the earth at an altitude of 2.982 x 10^5 m. He sends a radio transmission to a receiving antenna directly below him on the earth. What is the time delay between the time he sends his signal and when the receiving antenna on the earth picks it up?
Answers
calculate the height (in m) of a cliff if it takes 2.36 s for a rock to hit the ground when it is thrown straight up from the cliff with an initial velocity of 8.05 m/s. (enter a number.) 8.312 correct: your answer is correct. m (b) how long (in s) would it take to reach the ground if it is thrown straight down with the same speed? (enter a number.)
Answers
The time would it take to reach the ground if it is thrown straight down with the same speed is found to be 2.36sec
What do the first and second laws of motion mean?The velocity-time relation refers to the first motion equation, v = u + it. On the other hand, the position-time relation is denoted by the second equation of motion, s = ut + 1 / 2at2. The third equation of motion, v2 = u2+ 2as, is also referred to as the position-velocity relation.
S-(ut )-1/2 at2 =0
a=g=> -9.8m/s2
S=> 8.05x2.36 -9.8/2 x (2.36)2
S = -8.32m
S-(ut )-1/2 at2 =0
0 = -9.8 t2/2 +8.05t + 8.32
solve quadratic equation online
t=> 2.36sec
How is acceleration determined?The equation a = v/t denotes acceleration (a), which is the change in velocity (v) over the change in time (t). This enables you to calculate the change in velocity in metres per second squared (m/s2).
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A car starts from rest and accelerates uniformly over a time of 10.21 seconds for a distance of 210 m. Determine the acceleration of the car.
Answers
Answer:
4.03 m/s/s
Explanation:
d=1/2 a t^2
210 = 1/2 a (10.21)^2
210 = 52.1 a
a = 4.03 m/s/s
Which best represents the appearance of the moon on July 25, 2011
Answers
Answer:
Its the third quarter or waning quarter
Hope this helps :3
how do you find work when only given the angle a sled is pulled, the mass, the coefficent of kinetic friction and distance
Answers
Answer:
W = F * s
Work done equals applied force * distance traveled
Apparent weight = M g (1 - sin θ) since some of applied force will lighten sled
μ = coefficient of kinetic friction
F cos θ = force applied to motion of sled
s = distance traveled
[μ M g (1 - sin θ)] cos θ * s = work done in moving sled
Note that F = μ M g if applied force is in the horizontal direction
A car journey of 214 miles took Jack a total 7 hours and 15 minutes to complete what was his average speed across the journey?
Answers
Hurricanes are powered by heat energy in the atmosphere and the ocean. Typically, one hurricane uses an amount of heat roughly equal to Z thousand atomic bombs. If the excess heat built up in Earth's atmosphere since 1850 went into producing hurricanes, about how many more hurricanes might we expect in the world every year?
Answers
Answer:
In an year about 6 major hurricanes and 3 minor storms occurs.
Explanation:
Hurricanes are increasing in number and frequency to the increasing impact of global warming. As current research states that climate change in the tropics results in an increased storm frequency. The presence of extra heat in the air or the oceans form the stoma that leads to the production of such energy. According to o the 200-2007 data shows in the huge increase in the storm frequency and this suggests the impact of climate warming.We have an Atwood device, two blocks connect by a string strung over a pulley, but the twist this time is that both blocks are on perfectly smooth inclines. The upper block is on an incline 15 degrees to the horizontal and has a mass of 7kg. The lower block is on an incline of 65 degrees to the horizontal and has a mass of 11kg. Find the acceleration of the system?
Answers
The Acceleration of the system is 6.41 m/s².
Given,
α= 15°, m₁ = 7kg
β= 65°, m₂ = 11 kg
Let, a be the acceleration and T is the tensions at the end it's the cord.
Let, the mass m₂ be coming down along the inclined plane along the inclined surface towards downward m₂g sin β and the tension in the upward direction,
Resultant force, m₂a=m₂g sin β -T
11a=((11) ×g sin 65°) -T ...(i)
Now, considering the motion of m₁ which moves downwards, the forces are m₁g sinα, and T both are acting downwards.
Resultant force m₁a = m₁g sin α+T
7a =7g sin 15°+T ...(ii)
Solving both the equations by adding them,
18a=11gsin 65°+7g sin 15°-T+T
18a=11gsin 65°+7g sin 15°=115.45
a=115.45/18=6.41 m/s²
Hence, the Acceleration of the system is 6.41 m/s².
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Mr. Covault gave his students an assignment to design and conduct experiments that would allow them to find the relationship between force, mass, and acceleration. Some students decided to use a setup like the one below:
The applied force in this setup is equal to the weight of the item attached to the end of the pulley. One student tested the acceleration due to this force on a wooden block (as shown above); another student used a wheeled cart instead of a wooden block.
Mr. Covault's other students decided to simply drop objects. The force in that case is the weight of the object.
All the students measured the time it took each object, starting from rest, to move a certain distance. They used the time and distance to calculate the average acceleration.
Four students' results are shown below. A successful experiment should eliminate all forces acting on the object except the force being investigated. The experiment should confirm Newton's second law:
One newton (N) is 1 kg·m/s2.
Which of the following students had a well designed and conducted experiment?
Student Mass
(kg) Force
(N) Measured
Acceleration
(m/s2)
Kira 0.21 0.098 0.0047
Sophie 0.11 0.098 0.88
Jacques 0.050 0.49 4.9
Chase 0.50 4.9 8.9
Answers
Answer:
Sophie
Explanation:
Only Sophie's results supported Newton's second law. The other students' measured accelerations were significantly lower than expected. This could indicate that their experimental designs had not sufficiently eliminated drag forces.
F=ma Rearranging when solving for acceleration gives: a=F/m
a parking lot is going to be 60m wide and 240m long which dimensions could be used please please help
Answers
Answer: The area of the parking lot is 14,400 meters squared.
Explanation:
We have the dimensions of the parking lot.
60m by 240m
The units used here are meters.
Now, if we want to know the area of the parking lot is equal to the product between the length and the width:
A = 60m*240m = 14,400 m^2
The area of the parking lot is 14,400 meters squared.
Answer:
A = 20x80
Explanation: DID IT ON APEX
A drag racer accelerates from rest at an average rate of 13.2 m/s2 for a distance of 100. m. The driver coasts for 0.500 seconds and then uses the brakes and parachute to decelerate until the end of the track. The total length of the track is 180. m. What minimum deceleration rate must the racer have in order to stop prior to the end of the track
Answers
Over the first 100. m, the driver accelerates from rest to a speed v such that
v² - 0² = 2 (13.2 m/s²) (100. m)
⇒ v ≈ 51.4 m/s
For the next 0.500 s, the driver maintains this speed and covers a distance of
(51.4 m/s) (0.500 s) ≈ 25.7 m
The remaining length of track is
180. m - 100. m - 25.7 m = 54.3 m
and the driver must have a minimum acceleration a such that
0² - (51.4 m/s)² = 2a (54.3 m)
⇒ a ≈ -24.3 m/s²
Why is creativity important in constructing scientific questions?
A. Science only works when everyone does exactly the same thing.
B. Creativity is the only way to make a controlled experiment.
C. There are very few scientists who are creative people.
D. Asking an unusual question can lead to major breakthroughs.
Answers
Science does not work when every one does the same thing, some creative thinking will be major breakthroughs for an invention. Therefore, option B is correct.
Why creativity plays a role in scientific experiments ?So how do researchers come up with those particular questions to look into ! It may come as a shock to learn how much imagination is required for the procedure.
Peter Medawar, a Nobel Prize-winning biologist, once described scientific inquiry as "the art of the soluble" In order to succeed in science, one must first identify the questions that may be answered by scientific study and then determine the answers to those questions, according to Medawar.
Because of how intricate the natural world is, it is frequently impossible to directly address the really intriguing, significant scientific topics
The art of science includes repeatedly re-imagining these complex issues, mentally dividing them into more manageable components, and then guessing as to which of these more manageable components might hold the answer to solving the larger issue.
Therefore, all the discoveries and inventions are resulted from the creative ideas and thoughts of scientists. Therefore, creativity is the only way to make a controlled experiment.
Find more on scientific questions:
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A 16.75 g piece of iron absorbs 986.75 joules of heat energy, and it’s temperature changes from 25 degrees Celsius to 175 degrees Celsius. Calculate the specific heat capacity of iron.
Answers
Answer:
0.39 J/g°c
Explanation:
= heat / unit of mass × unit of temperature
986.75J/16.75g
= 58.9 J/g
∆T=175°c - 25°c = 150°c
986.75 / 150°c = 6.578
986.75 / 16.75g.150°c = 0.30 j/g°c