Which of the following information about motion can be determined by looking at a position vs. time graph that is a straight line?
a.frame of reference
b.average acceleration
c.velocity
d.direction of force applied

The size of the wavelength of a radio wave is in the order of millions of meters.

Radio wave is part of the electromagnetic spectrum. The radio wave is known to travel across a long distance because it has a long wavelength. This means that it has a low energy.

Hence, the size of the wavelength of a radio wave is in the order of millions of meters.

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Answer: Building

Explanation: took a quiz :)

Answer:

A light-year is a unit of distance. It is the distance that light can travel in one year. Light moves at a velocity of about 300,000 kilometers (km) each second. So in one year, it can travel about 10 trillion km. More p recisely, one light-year is equal to 9,500,000,000,000 kilometers

Here are the answers to the questions:1. Three main orbital changes that the earth undergoes and their time periods are:A. Precession- every 26,000 years B. Obliquity- every 41,000 years C. Eccentricity- every 100,000 yearsThese changes in the earth's orbit, together, have an impact on the amount of solar radiation that reaches the Earth's surface, which then affects climate change. Three cyclical orbital changes and their times associated with Milankovitch are:A. Eccentricity - every 100,000 yearsB. Obliquity - every 41,000 yearsC. Precession - every 26,000 years2. All EMR in order of wavelength are:- Gamma rays- X-rays- Ultraviolet radiation- Visible light- Infrared radiation- Microwave- Radio wavesForms of EMR from the sun that are reaching right now are UV radiation, visible light, and infrared radiation.

The number of forms of EMR reaching the moon right now is two, UV radiation, and visible light.The ozone layer is present in the stratosphere and is formed through a series of complex chemical reactions. The primary function of the ozone layer is to protect the earth from the harmful effects of UV radiation by absorbing it. The balance of EMR plays a critical role in the greenhouse effect. As the amount of greenhouse gases increases, the amount of energy that is absorbed by the Earth's surface also increases. Carbon dioxide and other greenhouse gases can absorb and emit infrared radiation, which plays a crucial role in climate change.3. The four forms of heat transfer to and on planet earth are:- Conduction- Convection- Radiation- AdvectionThese four forms of heat transfer are responsible for weather on planet Earth.

For example, when the sun heats the ground, it results in conduction, which then results in convection as the air heats up and rises. This can lead to cloud formation and precipitation.4. The time it takes for EMR from the University of Delaware to reach:A. Moon - About 1.28 secondsB. Jupiter - About 33.75 minutesC. Closest star (not the sun) - About 4.37 yearsD. Your mother - This question is not clear, please provide more context.

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Given that a 3.0 kg object is moving with an acceleration of 2.7 m/s² in the positive direction of the y-axis and The magnitude of the other force is determined to be 0.6 N.

To find the magnitude of the other force acting on the object, we need to use Newton's second law of motion, which states that the net force acting on an object is equal to the product of its mass and acceleration, \(F = ma\).

In this case, the net force acting on the object is the vector sum of the two forces. Let's denote the force acting in the positive direction of the x-axis as Fx and the force acting in the positive direction of the y-axis as Fy.

Given that the mass of the object (m) is 3.0 kg and the acceleration (a) is 2.7 m/s², we can calculate the net force as \(F = ma\).

Since the net force is the vector sum of Fx and Fy, we can write the equation as √(Fx² + Fy²) = ma.

We are given that Fx = 8.4 N, and we need to find the magnitude of Fy. Substituting the given values into the equation, we get √(8.4² + Fy²) = (3.0 kg)(2.7 m/s²).

Solving this equation, we find that Fy² = (3.0 kg)(2.7 m/s²)² - 8.4². Taking the square root of both sides, we find Fy ≈ 0.6 N.

Therefore, the magnitude of the other force acting on the object is approximately 0.6 N.

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Answer:

potential energy=mgh

=50×10×20

=10000 J

Red laser light from a He-Ne laser (λ = 632.8 nm) creates a second-order fringe at 53.2∘ after passing through the grating. The wavelength of light that creates a first-order fringe at 18.8° is approximately 257 nm.

To solve this problem, we'll use the grating equation:

mλ = d * sin(θ),

Where m is the order of the fringe, λ is the wavelength of light, d is the spacing between the grating lines, and θ is the angle of diffraction.

Given:

Wavelength of red laser light from He-Ne laser (λ) = 632.8 nm = 632.8 × \(10^{-9}\)m.

Second-order fringe angle (θ) = 53.2°.

We want to find the wavelength (λ') that creates a first-order fringe at 18.8°.

Let's start with the second-order fringe:

2λ = d * sin(53.2°)    (Equation 1)

Now, for the first-order fringe

λ' = d * sin(18.8°)     (Equation 2)

We can rewrite Equation 2 as:

d = λ' / sin(18.8°)     (Equation 3)

Substituting Equation 3 into Equation 1, we have:

2λ = (λ' / sin(18.8°)) * sin(53.2°)

Rearranging the equation to solve for λ', we get:

λ' = (2λ * sin(18.8°)) / sin(53.2°)

Substituting the given values:

λ' = (2 * 632.8 × 10^(-9) m * sin(18.8°)) / sin(53.2°)

Now, let's calculate the value:

λ' = (2 * 632.8 × \(10^{-9}\) m * 0.3249) / 0.8008

≈ 0.257 × \(10^{-6}\) m

Converting back to nanometers:

λ' ≈ 257 nm

Therefore, the wavelength of light that creates a first-order fringe at 18.8° is approximately 257 nm.

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Answer:

3m/s2

Explanation:

a = (v-u) / t

a = (25 - 10) / 5

a = 15 / 5

a = 3

Answer:

the answer is A. 4 carbon atoms, 4 hydrogen atoms, and 2 oxygen atoms

The number of atoms of each molecule of the reactants is required.

The correct option is c. 1 carbon atom, 4 hydrogen atoms, and 4 oxygen atoms

The given reaction is

\(CH_4+2O_2\rightarrow CO_2+2H_2O\)

For carbon atoms

The only carbon atom is present in \(CH_4\)

So, 1 carbon atom

The hydrogen atoms are also present is \(CH_4\)

There are 4 hydrogen atoms.

The oxygen atoms present is \(2\times 2=4\)

So, the number of atoms present in the reactants are c. 1 carbon atom, 4 hydrogen atoms, and 4 oxygen atoms

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The net force that it would produce here is 20N

F(net)= F1 + F2

F1=15N

F2=5N

therefore

15+5 = 20N

The vector sum of the forces exerted on a particle or object is known as the net force.

The net force is a single force that cancels out the original forces' influence on the motion of the particle.

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Answer:

Protists are called plant-like, fungus-like and animal-like because they share some of the characteristics of plants, fungi and animals, even though they belong in a different category: the kingdom Protista.

Explanation:

The acceleration with which an object falls through a fluid decreases as the speed of the object increases under gravity, to the point where the speed becomes constant, which is known as the terminal speed of the object

The unknown parameters are the mass of the feather, the density of the air, the feather's projected area and the coefficient of drag

The reason the above selected parameters are the correct unknowns is as follows;

The known parameter;

The speed of the feather the student drops off the building's top = 1.5 m/s

The required parameter;

The unknown parameters

Method;

Determine the terminal velocity parameters of the feather

The terminal velocity, \(\mathbf{V_t}\), of an item is the maximum steady speed the item reaches as it falls through a fluid. The terminal velocity of the feather is given by the following equation

\(Terminal \ velocity, V_t = \mathbf{\sqrt{\dfrac{2 \cdot m \cdot g}{\rho \cdot A \cdot C_d} }}\)

Where;

\(\mathbf{V_t}\) = Terminal velocity = The constant speed of the feather

m = Mass of the feather

g = Gravitational acceleration

ρ = Air density

A = The feather's projected area

\(C_d\) = Drag coefficient

The average speed of the feather = 1.5 m/s = The feathers typical or most common speed = The terminal velocity of the feather, \(\mathbf{V_t}\);

Plugging in \(\mathbf{V_t}\) = 1.5 m/s gives;

\(V_t = 1.5 \ m/s = \mathbf{\sqrt{\dfrac{2 \cdot m \cdot g}{\rho \cdot A \cdot C_d} }}\)

Therefore, the unknown parameters with regard to the feather falling are the parameters that are to be specified, including;

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Answer:

the angular acceleration of the gate is approximately 1.61  \(\frac{rad}{s^2}\)

Explanation:

Recall the formula that connects the net torque with the moment of inertia of a rotating object about its axis of rotation, and the angular acceleration (similar to Newton's second law with net force, mass, and linear acceleration):

\(\sum \tau_1=I\,\alpha\)

In our case, both forces contribute to the same direction of torque, so we can add their torques up and get the net torque on the gate:

\(\tau_{net}=(20*2+30*3.5) \,N\,m=145\,\,N\,m\)

Now we use this value to obtain the angular acceleration by using the given moment of inertia of the rotating gate:

\(\sum \tau_1=I\,\alpha\\145\,\,N\.m=(90\,\,kg\,m^2)\,\alpha\\\alpha= \frac{145}{90} \frac{rad}{s^2} = 1.61\, \frac{rad}{s^2}\)

The time it takes for the water along the shore to go from high to low and back again is six hours and 12.5 minutes between high tides, which happen every twelve hours and twenty-five minutes.

How long does it take for the tide to change from high to low?

six days, twelve and five minutes

Coastal locations see two high and two low tides every 24 hours and 50 minutes because the Earth spins through two tidal "bulges" every lunar day. There are 12 hours and 25 minutes between high tides. The sea level at the shore can change from high to low or from low to high in six hours and 12.5 minutes.

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The reason galaxies that are distant from our galaxy move away from our galaxy more rapidly is more space expands between us and distant galaxies.

A galaxy is a group of millions of stars and their systems that are grouped due to gravitational forces.

According to the Big Bang theory, galaxies are expanding and separate among them.

In conclusion, the reason galaxies that are distant from our galaxy move away from our galaxy more rapidly is more space expands between us and distant galaxies.

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Answer:

the galaxies are moving as the universe keep expanding .

Explanation:

The tension in the rope at the lower part of the swing is 388.2 N.

The tension in the rope at the lower part of the swing is calculated by applying the following formula.

T = W + Fc

where;

T = mg + mac

T = m (g + ac)

T = m (g + v²/r)

where;

The magnitude of the tension in the ropes is calculated as;

T = 30.8 (9.8  +  4.2²/6.29)

T = 388.2 N

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Answer:

55N

Explanation:

Impulse is the product of Force and Time

Impulse = Force * Time

Given

Impulse = 550Ns

Time = 10s

Force = Impulse/Time

Force = 550/10

Force = 55N

Hence the net force on the scooter is 55N

The amount of heat the cup absorb is 1003200 J.

Given,

Mass of coffee cup = 4.00 × 100 g or 4 kg

Room temperature = 20°C

Hot water temperature = 80°C

We have to find the amount of heat the cup absorbed.

Now, by using the specific heat formula, we have

Q = mCΔT

Where m is the mass of the substance, c is the specific heat, ΔT is the change in temperature, and Q is the amount of heat received or lost.

Putting the values, we get

Q = 4 × 4180 × (80°- 20°)

Q = 1003200 J/kg K

Hence, the amount of heat absorbed by the cup is 1003200 J/kg K.

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The statement "Two equations from classical mechanics can be combined together to give the Freidman equation which is important in cosmology" is False because Friedmann equation is a set of equations that govern the expansion of space in homogeneous and isotropic models of the universe within the context of general relativity.

Classical mechanics is one of the two main branches of mechanics, which is concerned with the motion of macroscopic objects. Classical mechanics is mainly concerned with the motion of objects that are large enough to be observed directly, as well as the forces that cause this motion and how it responds to those forces.

The Friedmann equation is a set of equations in physical cosmology that govern the expansion of space in homogeneous and isotropic models of the universe within the context of general relativity. It is named after the Russian physicist Alexander Friedmann, who derived it in 1922, and who was one of the first people to consider models of the expanding universe that were based on the Einstein field equations of general relativity.

According to the given statement, two equations from classical mechanics can be combined to give the Friedman equation which is important in cosmology. This is not correct. Hence, the correct option is: False.

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When a battery, a capacitor, and a resistor are connected in series, the maximum charge stored on the capacitor is affected by several factors. These factors include the capacitance of the capacitor, the resistance of the resistor, and the voltage of the battery.

The maximum charge that can be stored on a capacitor is directly proportional to the capacitance of the capacitor. This means that the larger the capacitance of the capacitor, the larger the maximum charge that can be stored on it.

The maximum charge stored on a capacitor is also affected by the resistance of the resistor in the circuit. This is because the resistor limits the amount of current that can flow through the circuit, which in turn affects the rate at which the capacitor can be charged.

Finally, the voltage of the battery also affects the maximum charge stored on the capacitor. The larger the voltage of the battery, the larger the maximum charge that can be stored on the capacitor.

Overall, the maximum charge stored on a capacitor when a battery, a capacitor, and a resistor are connected in series is influenced by the capacitance of the capacitor, the resistance of the resistor, and the voltage of the battery.

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Answer:

D

Explanation:

its mass would be the same

because the mass of an object is constant or its independent of the gravitational force or pull

If the launch speed of the rock from the tower is doubled, the time it takes to hit the ground would be halved.

This is because the launch speed and the time it takes to hit the ground are inversely proportional.

To explain this further, let's use the formula for the vertical displacement of a projectile:

y = v0yt - (1/2)gt2

Where y is the vertical displacement, v0y is the initial vertical velocity (or launch speed), t is the time, and g is the acceleration due to gravity.

If we double the launch speed (v0y), the equation becomes:

y = 2v0yt - (1/2)gt2

Since we want to find the time it takes to hit the ground, we can set y to 0 and solve for t:

0 = 2v0yt - (1/2)gt2

(1/2)gt2 = 2v0yt

t = (2v0y)/((1/2)g)

t = (4v0y)/g

As you can see, the time is now half of what it was before the launch speed was doubled. Therefore, if the launch speed of the rock is doubled, the time it takes to hit the ground is halved.

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Answer:

DU = -80 Joules

Explanation:

Given the following data;

Work done = 100 J

Quantity of heat = 20 J

To find change in internal energy of the gas;

Mathematically, the change in internal energy of a system is given by the formula;

DU = Q - W

Where;

DU is the change in internal energy.

Q is the quantity of energy.

W is the work done.

Substituting the values into the formula, we have;

DU = 20 - 100

DU = -80 Joules

Therefore, the final energy of the gas is lower than its initial energy.

The farthest distance of a satellite signal that can directly reach is the length of the signal range of the satellite.

A satellite is a celestial body orbiting around another planet or a star, which is generally used to communicate with other devices over the globe or to collect data of various other kinds. It's a man-made or natural body that revolves around a planet.

A satellite is typically a communications device that communicates with Earth or with other satellites. To communicate with Earth, satellites utilize radio waves that are transmitted from antennas on Earth and received by antennas on the satellite.

Therefore, the farthest distance of a satellite signal that can directly reach is the length of the signal range of the satellite.The measure of the intercepted arc is 216°

Explanation:We are given that angle formed by the tangent satellite signal is 104°.

Since the sum of an inscribed angle and a central angle of the same arc is 180°, and since the tangent and intercepted arc form an inscribed angle and central angle,

the intercepted arc's central angle is 180-104 = 76°.

Again, central angles have the same measure as their intercepted arcs.

Therefore, the intercepted arc is 76°.Since the entire circle is 360°, the measure of the un-intercepted portion is 360 - 76 - 68 = 216°.Therefore, the measure of the intercepted arc is 76°.

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Answer:

B aluminum

Explanation:

Because aluminum loses 3 types of electrons and it donates it to fluorine.

When a light rain falls after oil and gasoline have leaked onto the road surface, it can cause the car to become less responsive and more difficult to control.

This is because the oil and gasoline act as a slippery layer on the road surface, which reduces the friction between the tires and the road. The rainwater can then mix with the oil and gasoline, making the layer even more slippery and reducing the vehicle's grip on the road.

To help mitigate this issue, drivers should be aware of their surroundings and the potential for slippery surfaces, and should adjust their speed and driving accordingly. Additionally, using tires with greater tread, or using more aggressive tires designed for wet and slippery conditions, can also help increase the vehicle's grip on the road.

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A force on the free-body diagram above which represents the normal force acting on the car include the following: D. Force A.

In Science, a free-body diagram can be defined as a graphical illustration which is typically used in the field of science to visualize moments, tension, and applied forces that are acting on an isolated or rigid object (body), while using arrows to point in the direction of these forces.

Since this car was driven to the right, with a large amount of air resistance acting on it, and its engine provides the forward motion, we can reasonably infer and logically deduce that the normal force which is acting on the car is represented by Force A as illustrated by the free-body diagram shown in the image attached above.

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Answer: x(t2)−x(t1) over the time interval [t1,t2]

Explanation: hope this helps

a) The apparent power for the new load alone is 50 kVA.

b) The power factor for the combination of both loads is 1 (unity power factor).

c) There is no reactive power for the combination.

d) The new apparent power for the combination of both loads is 100 kVA.

To solve the given problem, we'll use the formulas and relationships related to power factor, apparent power, real power, and reactive power.

Original load: 50 kW, unity power factor (cos φ = 1)

New load: 50 kW, unity power factor (cos φ = 1)

a) The apparent power (S) for the new load alone can be calculated using the formula:

S = P / cos φ

For the new load alone, the real power (P) is 50 kW, and the power factor (cos φ) is 1 (unity power factor).

Therefore, the apparent power for the new load alone is:

S_new_load = 50 kW / 1

S_new_load = 50 kVA

b) To find the power factor for the combination of both loads, we can use the formula:

cos φ_combination = (P_total) / (S_total)

Since both loads have unity power factors, the total real power (P_total) will be the sum of their individual real powers:

P_total = P_original_load + P_new_load

P_total = 50 kW + 50 kW

P_total = 100 kW

The total apparent power (S_total) can be calculated by adding the individual apparent powers:

S_total = S_original_load + S_new_load

S_total = 50 kVA + 50 kVA

S_total = 100 kVA

Now, we can calculate the power factor for the combination:

cos φ_combination = 100 kW / 100 kVA

cos φ_combination = 1

Therefore, the power factor for the combination of both loads is 1 (unity power factor).

c) Since the power factor is unity (cos φ = 1), there is no reactive power (Q) for the combination. Reactive power exists only when the power factor is less than 1.

d) The new apparent power (S_new_apparent) for the combination of both loads can be calculated using the formula:

S_new_apparent = √(P_total^2 + Q_total^2)

As mentioned earlier, the power factor is unity, so the reactive power (Q_total) is zero.

Therefore, the new apparent power for the combination is:

S_new_apparent = √(100 kW^2 + 0^2)

S_new_apparent = √(10000 kW^2)

S_new_apparent = 100 kVA

Therefore, the new apparent power for the combination of both loads is 100 kVA.

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Answer:

105.6 KJ

Answer

3.7/5

4

hope this will help you friend.