Homework Statement
James is running west wrt the ground and Billy is running east wrt the ground, but twice as fast as James. How does the relative velocity of James wrt Billy differ if they are running toward each other or away from each other? Explain.
*wrt = with relation to*
Homework...
Now earlier today I got to the same part as @Isaac0427, with 0.52s being the time for sound to travel. Then I was still stick at attempting the stone, as since t = D/V, i was not sure which velocity i could use to solve for this part of the problem
Homework Statement
A woman drops a stone into a well 180 m deep. If the air temperature is 20 oC, how much time will elapse between the moment the stone is dropped and the moment the sound of the stone hitting the bottom of the well is heard? [6.6s]
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Homework Equations
Vsound = 331.4 +...
Well it says EVERY 50CM, so I took that as the distance between nodes as its a standing wave question. I assumed the brick wall to be a fixed - open, so node to node, meaning LAMBDA is equal to 2L. L being 50cm --> (2)(.5) = 1 meter.
plug into universal wave equation v = f x lambda
343.2 = f x...
1. a source of sound is directed a large brick wall. a girl walks towards the wall and notices that the intensity of the sound decreases to aminimum every 50cm. what is the frequency of the sound? the air temperature is 20 degrees celsius (answer is 344Hz)2. attempted to use the universal wave...
Sorry for troubling you but could you please solve it with numbers in a reply? I attempted to use the equation you just showed me but I am still stuck/unsuccessful. It would be greatly appreciated if you could, thanks.
Problem: A swimmer sees a parachutist hit the water and hears the impact twice, once through the water and the second time through the air, 1.0s later. How far from the swimmer did the impact occur. Vs of air is 340m/s. Vs of water is 1400m/s and the answer in the book is 450m. 2. I know this is...