1. How do we tell how much energy a ray of light has?

By it's temperature

By it's color

By it's brightness


2. Which of the following are common forms of energy released by electrons dropping from heightened energy levels?

Light, Heat

Motion, Sound

Light, Kinetic

Heat, Potential


4. Describe the shape of a field created by a bar magnet.



5. On a microscopic scale, the energy change in a system is described by a

A change in color or texture

Measuring the temperature

A chemical equation

An odor


6. The aurora borealis lights that appear in the northern hemisphere are caused by the interaction between what?

Ultraviolet radiation from the Sun and the pollution in the Earth's air

The reflected light off the moon and the scattering particles in the atmosphere

The charged particles from the Sun and natural magnetic field of the Earth


7. What happens to the atoms of a material when you run electricity through that material?

The bonds that hold the atoms together begin to stretch due to the electric current

The neutrons, having no charge, resist the flow the electric energy through the atom

The electricity only goes into atoms that have an overall electric charge of the same orientation of the electric flow


8. The amount of potential energy stored in a magnetic field depends on what?

The size of one magnetic pole

How close two magnet poles are to each other

The number of molecules magnetically aligned in a pole

Whether the pole is a North or South pole magnet


9. Compare and contrast microscopic and macroscopic energy transfer. Give at least three comparisons for each.



10. A plane is landing at an airport. The plane has a massive amount of kinetic energy due to it's motion. When the plane lands, it activates its brakes, causing it to slow down and eventually stop. The kinetic energy that the plane had is now gone. In keeping with the Law of Conservation of Energy, which of the following is the most likely explaination of what happened to that energy?

The brakes used a coil system to convert the kinetic energy into potential energy stored in the brakes

The kinetic energy of the plane gets pushed into the air in front of it due to drag forces, causing the air to move, thus transferring the kinetic energy from the plane to the air

The brakes create friction, which transformed the kinetic energy to heat energy that was dissipated to the surroundings

The kinetic energy is being converted into sound energy by the loud engines of the plane

Answer:

D

Explanation:

Answer:

HELLO THERE

Explanation:

D

Answer:

RT = 35 Ohms

Explanation:

Let the three resistors be R1, R2 and R3 respectively.

Given the following data;

R1 = 14 Ohms

R2 = 12 Ohms

R3 = 9 Ohms

To find the total resistance, RT;

Since all the resistors are connected in series, the total resistance is equal to the sum of all three resistance of the resistors.

RT = R1 + R2 + R3

Substituting into the equation, we have

RT = 14 + 12 + 9

RT = 35 Ohms.

Therefore, the total resistance of the circuit is 35 Ohms.

Answer:

For the first one shown, the answer is Directly Proportional, The second one is Inversly Proportional, and the last is fourtl times the original value

Answer:

if you mean the regions during slavery, North, but if in general, East. (think East Coast)

Answer:

Vibrations are sent through the air to your ears.

Explanation:

Sound is a form of energy that is transmitted in compression and rare factions. Sound is a mechanical wave. All mechanical waves require a material medium for propagation.

The material medium for the propagation of sound is air. When the sound is produced by the speakers, the molecules of air are set into vibration and this vibration carries the sound from the speaker to your ears.

Answer:

Chemical weathering

Explanation:

This changes the molecular structure of rocks and soil. For instance, carbon dioxide from the air or soil sometimes combines with water in a process called carbonation. This produces a weak acid, called carbonic acid, that can dissolve rock.

Answer:

0.5 second

Explanation:

We are given that

Force, F=20 N

Mass, m=5 kg

Change in velocity,=2m/s

We have to find the time taken to change the velocity .

We know that

Force, F=ma

Where

Acceleration, a=Change in velocity/time

[tex]a=\frac{2}{t}[/tex]

Substitute the values

[tex]20=5\times \frac{2}{t}[/tex]

[tex]t=\frac{5\times 2}{20}[/tex]

[tex]t=0.5 s[/tex]

Answer:

306 m/s

Explanation:

Law of conservation of momentum

m1v1 + m2v2 = (m1+m2)vf

m1 is the bullet's mass so it is 0.1 kg

v1 is what we're trying to solve

m2 is the target's mass so it is 5.0 kg

v2 is the targets velocity, and since it was stationary, its velocity is zero

vf is the velocity after the target is struck by the bullet, so it is 6.0 m/s

plugging in, we get

(0.1 kg)(v1) + (5.0 kg)(0 m/s) = (0.1 kg + 5.0 kg)(6.0 m/s)

(0.1)(v1) + 0 = 30.6

(0.1)(v1) = 30.6

v1 = 306 m/s

The initial velocity of the bullet can be determined from the total momentum of the system. The velocity of the bullet was 306 m/s.

Momentum of a body is the product of its mass and velocity. For a collision, the momentum before and after collision will be the same for the colliding system.

Let m1 and m2 be the masses and u be the initial velocity and v is the final velocity.

then,  m1 u1  + m2 u2 = m1 v1  + m2 v2.

Given m1 = 5 kg

m2 =  0.1 kg

The velocity of the combined mass v = 6 m/s.

The momentum of the target is zero since it was stationary.

(0.1 × u1) = (0.1 + 5)6 m/s

(0.1 × u1) = 30.6 m/s

then u1 = 30.6/0.1 = 306 m/s

Therefore, the velocity of the bullet before hitting was 306 m/s.

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Answer:

What is the half-life of isotope X?  25 seconds

How many radioactive atoms of isotope X are left after 3 half-lives? 13

How many half-lives must have occurred if only 7 atoms of isotope X are left? 4

Explanation:

The half-life of isotope X is 25 seconds

The radioactive atoms of isotope X left after 3 half-lives are 13

Number of half-lives must have occurred if only 7 atoms of isotope X  left are 4.

Half life is the time taken by a radioactive material for the radioactivity of to reduce by half its original value.

The half life equation is:

A = A₀ (½)^(t / T)

where A is the final amount, A₀ is the initial amount, t is the amount of time, and T is the half life.

The half-life of isotope X is 25 seconds

The radioactive atoms of isotope X left after 3 half-lives are 13

Number of half-lives must have occurred if only 7 atoms of isotope X  left are 4.

Thus, the questions are answered.

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Answer:

The sun generates energy from a process called nuclear fusion. During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons. Hydrogen nuclei fuse to form one helium atom. During the fusion process, radiant energy is released. :D

Answer:

pollination

Explanation:

it involves the transfer of a fertilized plant to another

Answer:

pollination

Explanation:

plants can't really do much without bees keep in mind

Answer:

The first one is 9 times the original

The second one is 1/2 times

The third one is 1/3 times

Answer:

When the string moves, it creates a very small change in the distance to the next point, th

Explanation:

When the string moves, it creates a very small change in the distance to the next point, this generates a restoring force that tends to push the string back, this small disturbance propagates along the string and is what creates the pulse.

This is similar to what happens when a spring is stretched and a restoring force is generated shaved by the law of shortening.

            F = k Dx

Answer:

As the first particle travels upward, it pulls on the next particle, which follows the first particle upward. Then next in line is pulled up in turn, and so on. The motion of each particle follows the one before it, either up or down, with a slight lag in time. This succession of particles moving up or down travels along the string as a wave. Eventually, it pulls every particle along the string up and down in series.

Explanation:

An unmanned spacecraft leaves for Venus. The statements, The weight of the spacecraft keeps changing and The mass of the spacecraft remains the same. This 2 statements A and D are true.

A spaceship is a machine or vehicle built to travel through space. Spacecraft are a form of artificial satellite utilised for a wide range of tasks, such as communications, Earth observation, meteorology, navigation, space colonisation, planetary exploration, and freight and person transfer. All spacecraft, with the exception of single-stage-to-orbit vehicles, need a launch vehicle (carrier rocket) to get into space.

A spacecraft that is performing a sub-orbital spaceflight launches into space and then lands without gaining enough momentum or energy to complete a full orbit of the Earth. Spacecraft enter confined orbits around the Earth or other celestial bodies for orbital spaceflights. Only humans are carried on human spacecraft either as crew or guests from launch or while in orbit (space stations).

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The time taken for Planet Mercury to orbit around the sun is determined as 1.21 x 10⁶ s.

The time of motion of the planet around the sun is calculated as follows;

[tex]T = 2\pi \sqrt{\frac{a^3}{Gm} } \\\\[/tex]

where;

[tex]T = 2\pi \sqrt{\frac{(5.8 \times 10^{10})^3}{(6.67 \times 10^{-11})(1.99\times 10^{30})} } \\\\T = 1.21 \times 10^6 \ s[/tex]

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Answer:

D: 2π/√k0

Explanation:

I got it right

The slope of the line of best fit is the quantity 2π/√ko.

The line of best fits is used to show the relationship between two variables. The nature of the graph shows the relationship between the variables.

We can see that this is a graph of the period of oscillation against the square root of the mass of the body. The slope of the line of best fit is the quantity 2π/√ko.

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Answer:

Total resistance = 35 ohms

Explanation:

Given that,

Three resistors are 14 ohms 12 ohms and 9 ohms are connected in series.

For a series combination, the equivalent resistance is given by :

[tex]R_s=R_1+R_2+R_3\\\\R_s=14+12+9\\\\R_s=35\ \Omega[/tex]

So, the total resistance of the circuit is [tex]35\ \Omega[/tex].

Answer:

The elastic potential is 1/2 as much.

Explanation:

The reason I say this is because of you take a new rubber band, after stretching the first time, all the way until it doesn't snap, you stretch it again and there's not as much resistance as when it was new.

I hope this helps.

Explanation:

A force is a push or pull upon an object resulting from the object's interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects. When the interaction ceases, the two objects no longer experience the force.

Answer:

There are 2 definitions chose the suitable one for ur question

Explanation:

1. strength or energy as an attribute of physical action or movement.

2. coercion or compulsion, especially with the use or threat of violence.

HOPE THIS HELPS

Answer:

no im in a rehab program so we eat the sam shi every day

Explanation:

brainlest?

Explanation:

During lockdown, I ate LOADS OF JUNK FOOD. TRUST ME!!

I gained 14 kg of weight and became 68 kg

just due to junk food.I am 13 btw and at that time I was 5 feet 4 so definitely fat. all those pizzas and burgers and all.then I realised that I have gained weight. I have to REDUCE MY WEIGHT. I am quite determined on what I say. it took me 3 months or so and I finally got back to my original weight. How? just by going for a stroll everyday, eating healthy and constantly working out. eating less is not the solution,eating less calories is the solution.Also, by eating healthy food,I grew taller. I am 5 feet 6 now. So yes, definitely it helps put alot and keep eating healthy food and you will definitely be healthy.

Thank You.

Answer:

The force applied to the spring is 35,780 N

Explanation:

Given;

extension of the spring, x = 200 mm = 0.2 m

energy stored in the spring, E = 3578 J

The force applied to the spring is calculated as;

E = ¹/₂Fx

where;

F is the applied force

F = 2E/x

F = ( 2 x 3578) / 0.2

F = 35,780 N

Therefore, the force applied to the spring is 35,780 N

Answer:

The tangential acceleration is 0 m/s².

Explanation:

Answer:

The tangential acceleration is 0 m/s².

Explanation:

Answer:

The wave diagramed in blue.

Explanation:

The reason for this is because frequency is explained as the number of times something has occurred in a certain period of time.

Here, we are talking about wavelength, so the frequency is the number of times the wave can oscillate in this time length.

Say we make dots on the middle of each downward slope. How long does it take to get to each dot compared to the other diagram? The answer is the one with the least amount of time. The wave diagramed in blue.

Answer:

The correct answer is oxygen and hydrogen

Answer:

oxygen and hydrogen

Explanation:

because h20 has 2 oxygen and 2 hydrogen

Answer:

I'm pretty sure it's half

Answer:

half

Explanation:

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