Question 1

Two waves are moving towards each other. Wave 1 has an amplitude of +4 and wave 2 has an amplitude of + 2. What is the total amplitude?

Accepted Answer

6

Answer

8

Answer

4

Answer

2

Question 2

Which of the following is NOT TRUE for standing wave?

Accepted Answer

It transfers energy.

Answer

Its wave pattern does not appear to move.

Answer

It corresponds to the resonant vibration of the string.

Answer

It is stationary.

Question 3

Two waves are moving towards each other as shown below. What is their displacement wave?

Accepted Answer

https://uploads.quizalize.com/b782dd54-0e92-47fc-bbda-9ae1e79da4a5/question/3fc81607eacce2d31933654834ef63b7f9dfb967.JPG

Answer

https://uploads.quizalize.com/b782dd54-0e92-47fc-bbda-9ae1e79da4a5/question/c505460c856c9488423f17b71b1371dbec903a07.JPG

Answer

https://uploads.quizalize.com/b782dd54-0e92-47fc-bbda-9ae1e79da4a5/question/4f4d59edb1a0dcda57ec1b011f6a711dc1041db3.JPG

Answer

https://uploads.quizalize.com/b782dd54-0e92-47fc-bbda-9ae1e79da4a5/question/6e017c20016968e0ce96d3864915d4a74184d16c.JPG

Question 4

Marinel is waiting for a bus when a firetruck speeds fast her. She noticed that the pitch of the firetruck’s siren decreases as it moves away from her. Why does this happen?

Accepted Answer

The frequency of sound decreases as the source of sound moves away from the listener.

Answer

The pitch of the firetruck’s siren decreases as the speed of the firetruck increases.

Answer

The frequency of sound increases as the source of sound moves away from the listener.

Answer

The pitch of the firetruck’s siren increases as the speed of the firetruck increases.

Question 5

Which of the following is FALSE?

Accepted Answer

Standing waves are produced on a string if the oscillations travels from the string to another medium.

Answer

Energy on standing waves are not transferred.

Answer

Constructive interference occurs if two waves that are about to meet are in-phase.

Answer

The superposition principle is about wave interferences.

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