Aspeaker at the front of a room and an identical speaker at the rear of the room are being driven at 456 hz by the same sound source. a student walks at a uniform rate of 1.02 m/s away from one speaker and toward the other. how many beats does the student hear per second? (take the speed of sound to be 343 m/s.) hint: the doppler effect causes both frequencies to be shifted. the difference between those two frequencies is what causes the beats. hz ( + 0.2 hz)

2.71207 Hz

Explanation:

v = Speed of sound in air = 343 m/s

= Relative speed between the speakers and the student = 1.02 m/s

f' = Actual frequency of sound = 456 Hz

Frequency of sound heard as the student moves away from one speaker

Frequency of sound heard as the student moves closer to the other speaker

The difference in the frequencies is

The student hears 2.71207 Hz

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask

1 - wave length

2 - amplitude

3 - crest

4 - trough

explanation:

duh.