Sound

If you have any questions please post accordingly...

SPEED TEST
1. D
The is no medium in outer space for sound to travel
2. B
The particles inside a solid are closely packed, thus allowing the transfer of vibrational energy to be faster.
3. C
Human’s audible range is 20 Hz to 20kHz.
4 . B
Satellite does not communicate using sound waves
5 B
Time to travel across room = 0.060 s / 2 = 0.030 s
Distance = 330 x 0.030 = 9.9 m
6. C
Increase frequency of teeth hitting card to increase pitch
7. C
Higher pitch implies higher frequency , more waves generated per second
8. B
Reflected wave has the same wavelength but different velocity due to the change in direction. The amplitude will be lower.
9. A
All electromagnetic waves are transverse wave
10. B
1^st echo = (330 m x 2) / 330 ms^-1 = 2.0 s
2^nd echo = (660 m x 2) / 330 ms^-1 = 4.0 s
Therefore time interval is 2.0 s

1001


TYS


ASSIGNMENT


WORKBOOK