Hi, I'm having a hard time working out these 4 problems on my review sheet. Could someone please help me the following problems and show me the steps or the formulas, our book in school is not any help-it's old? Thanks:) (Best Answer will be picked).
A 0.92Hz continous wave travels on a Slinky. If the wavelength is 0.68m, what is the speed of the wave?
____m/s
The force stretching a string with linear mass density 0.005kg/m is 113N. What is the speed of a wave on the string?
___m/s
If you are very far away from an object when it is hit, you often see the collision before you hear it. For example, lets say you are 1100m from a gun when it is fired.
a) How long will it take for you to see the gun fired?
____s
b) How long will it take for you to hear the gun fired?
____s
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Sonar: Suppose you are fishing using your handy dandy new sonar. The sonar display tells you there is a school of fish 181m away. How long did it take the take the signal to travel round trip? __s
2007-03-26 07:00:06 · 4 answers · asked by Zalak 1 in Science & Mathematics ➔ Physics
These are the set ups:
V=f λ
=0.92 Hz * 0.68 m = 0.626 m/s
The wave velocity = square root of the (Tension / linear mass density)
= (113 N / 0.005 kg/m)^1/2
t = d/v (light)
= 1100 m / 299,792,458 m/s = 1100 m / 3.00*10^8 m/s
t = d/v (sound)
= 1100 m / 344 m/s
t = d/v (sound in water) one way
= 181 m / 1500 m/s
multiply by 2 to get time for round trip.
2007-03-26 17:05:17 · answer #1 · answered by Richard 7 · 15⤊ 1⤋
Physics Word Problems
2016-11-12 03:02:50 · answer #2 · answered by ? 4 · 0⤊ 0⤋
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2016-10-01 12:39:57 · answer #3 · answered by ? 4 · 0⤊ 0⤋
181 times pie squared over mC2
2007-03-28 11:30:39 · answer #4 · answered by PS3 fan boy! 2 · 0⤊ 1⤋