The Doppler Effect is produced.... *

Answers

Answer 1

Answer: The Doppler effect is observed when the distance between
the source and the observer is changing.

You have to say it that way, because 'motion' isn't enough.
It has to be motion along the line between them.

For example, if the source is whizzing in a circle around the
observer, or the observer around the source, then the distance
between them isn't changing, and there's no Doppler effect.

Answer 2

Answer: C. Because as either one or both of the objects receiving or producing the sound has to move to create the doppler effect.

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A sample contains 100 g of a radioactive isotope. How much radioactiveisotope will remain in the sample after 2 half-lives? OA. 50 gOB. 25 gOC. 75 gOD. 100 g
The power in an electrical circuit is given by the equation P= RR, where /isthe current flowing through the circuit and Ris the resistance of the circuit.What is the power in a circuit that has a current of 12 amps and a resistanceof 100 ohms?A. 144 wattsB. 8.3 wattsc. 1200 wattsD. 14,400 watts
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What is one factor that helps keep the planets and other solar system objects in orbit around the sun? A.nuclear fusion in the sunB.the great distance between the sun and the planetsC.force of gravity the galaxy exerts on all objects in itD.the gravitational force between the sun and each object in the solar system

a wave in the ocean has an amplitude of 3m. Winds pick up suddenly, increasing the wave's amplitude to 6m. How does this change in amplitude affect the wave's frequency and the amount of energy it transports

Answers

Answer

Hi,

An increase in amplitude from 3m to 6 m increases the energy it transports. The frequency of the wave is not affected

Explanation

Amplitude is the height of a wave where as frequency is the number of waves that pass by each second. A wave with bigger amplitude has more energy than a wave with smaller amplitude. A point where more waves pass contains more energy that is transferred every second. The change in the amplitude of a wave does not change its frequency. However, frequency is inversely related to the wavelength of a wave.

Best Wishes!

Why do we get tired?

Answers

We get tired because our bodies are always working and using energy. And doing all that work makes our bodies need rest and sleep.

In the national grid,what does the step up transformer do?

Answers

In the National Grid, the Step Up Transformer increases the amount of voltage that is passing through the grid at any one time. These are used at power stations, as without them, there would not be enough power to transport the electricity around the national grid.
Hope this helps :)

The power that's lost when current flows through anything is

(current)² times (resistance).

You can see that in order to minimize the power lost in transporting electrical
energy from one place to another, you'd want to make both the resistance of
the conductors and the current through the lines as low as possible.

The resistance is reduced by using heavier (fatter) conductors, and using
as much silver or copper in them as possible ... both very expensive.

Power = (current) times (voltage), so the way to reduce the current while
shipping the same power from place to place is to increase the voltage.
That's exactly what the transformer does ... it changes the voltage and
current, while keeping their product the same. It's used to step the voltage
up for transmission, in several steps from the generating station all the way
to the residential neighborhood, and then finally back down, on the pole
near your house.

How can you make gravity smaller and bigger

Answers

The force of gravity = GMm / r^2, where G is gravitational constant, M is mass of one object, m is mass of another object, r is distance between them.

To make gravity smaller, decrease mass or increase distance.
To make gravity bigger, increase mass or decrease distance.

You can increase the forces of gravity between you and,
let's say, a planet, in two ways.

Way #1:
Increase your mass.
(Eat or drink more.
Fill your pockets with rocks.
Put on a heavy coat or space suit.)

Way #2:
Get closer to the center of the planet.
(That only works down to the planet's surface, but
it stops working if you go below the surface.)

To decrease the forces of gravity, do exactly the opposite:
-- lose weight
-- get farther away from the object that gravity is attracting you to .

Also, don't forget:
The forces of gravity always work both ways.
The less the planet pulls on you, the less you pull on the planet.
The harder the planet pulls on you, the harder you pull on the planet.

write a good scientific question that can be answered by Guadalupe based on what is described above. Label the independent and dependent variable within your question.

Answers

To do that, we would need to know what is "described above".

A 4.8-kilogram ball moving at 8 m/sec to the right collides with a 1.4-kilogram ball at rest. After the collision, the 4.8-kilogram ball moves at 4.8 m/sec to the right. What is the velocity of the 1.4-kilogram ball?m/s

Answers

The final velocity of the 1.4 kg ball is 11.0 m/s to the right

Explanation:

We can solve this problem, by using the law of conservation of momentum: in fact, the total momentum of the two balls must be conserved before and after the collision. Therefore, we can write:

$p_i = p_f\nm_1 u_1 + m_2 u_2 = m_1 v_1 + m_2 v_2$