1
answer
0
watching
78
views
23 Nov 2019
1 ) A source of sound waves of frequency 0.9 kHz is travelingthrough the air at 0.75 times the speed of sound.
(a) What is the frequency of the sound received by a stationaryobserver if the source moves toward her? unit in kHZ
(b) Now, the source moves away from the stationary observer. Whatis the frequency of the sound received in this case? unit inKHZ
2 ) Steel railroad tracks of length L = 18.20 m are laid at 10.0°C. How much space should be left between the track sections if theyare to just touch when the temperature is T = 49.5° C?
1 ) A source of sound waves of frequency 0.9 kHz is travelingthrough the air at 0.75 times the speed of sound.
(a) What is the frequency of the sound received by a stationaryobserver if the source moves toward her? unit in kHZ
(b) Now, the source moves away from the stationary observer. Whatis the frequency of the sound received in this case? unit inKHZ
2 ) Steel railroad tracks of length L = 18.20 m are laid at 10.0°C. How much space should be left between the track sections if theyare to just touch when the temperature is T = 49.5° C?
Sixta KovacekLv2
28 Jun 2019
