Physics, 27.08.2019 10:00 janreyes39

Wave a is being decreased in temperature, and wave b is moving from a liquid to a gas medium. which statement can be made about both waves?
they will speed up.
they will increase the density of their medium.
they will slow down.
they will decrease the density of their medium.

Answers: 2

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Answer from: sandovalito

They will slow down, as temperature decreases the molecules slow down causing the wave to decrease in speed.

Answer from: luhmama

They will slow down.

Explanation:

In the first case, the temperature of the medium of wave A is decreased. This means that the vibration (or the motion) of the molecules of the medium will slow down, and since the wave is transmitted through the vibration of the molecules, this means that the wave will slow down, since it will be propagated slower.

In the second case, the wave moves from a liquid to a gas. In a gas, particles are more spread apart compared to a liquid, therefore the transmission of the wave from one particle to another occurs with less efficiency (because there are less collisions between the molecules), and so the wave will slow down in this case as well.

Answer from: Quest

e) none of the above answers are correct

Answer from: Quest

Is a vector quantity that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.

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Wave a is being decreased in temperature, and wave b is moving from a liquid to a gas medium. which...

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