Which situations might cause two observers (A and B) to measure different frequencies for the same vibrating object? Select the two correct answers. (1 point)

Question

Responses

Observer A is stationary and Observer B is moving.
Observer A is stationary and Observer B is moving.

Observer A and Observer B are moving at different speeds relative to each other.
Observer A and Observer B are moving at different speeds relative to each other.

Observer A and Observer B are both stationary and at the same distance from the object.
Observer A and Observer B are both stationary and at the same distance from the object.

Observer A and Observer B are stationary but at different distances from the vibrating object.

Answer 1

The two correct answers that can cause two observers (A and B) to measure different frequencies for the same vibrating object are:

1. Observer A is stationary and Observer B is moving.
2. Observer A and Observer B are moving at different speeds relative to each other.

These situations involve the Doppler effect, where the relative motion between the source of sound and the observer results in different observed frequencies.