Homework Statement
A transverse wave on a cord is given by D(x, t) = 0.19sin(2.9x - 35t), where D and x are in m and t is in s.
1) At t = 8.6*10^-2 s, what is the displacement of the point on the cord where x = 0.62 m?
2) At t = 8.6*10^-2 s, what is the velocity of the point on the cord...
Homework Statement
A jet plane emits 3.0×105 J of sound energy per second.
1) What is the sound level 21 m away?
2) Air absorbs sound at a rate of about 7.0 ; calculate what the sound level will be 5.00.
3) Calculate what the sound level will be 7.50 away from this jet plane, taking...
Scratch that, I figured it out!
Since d = l, I replaced l with d in the equation.
d = 0.53sqrt(37l/0.54) ---> d = 0.53sqrt(37d/0.54)
d/sqrt(d) = 0.53sqrt(37/0.54) ---> d/sqrt(d) = 4.387
d/sqrt(d) = d^(1/2) ---> sqrt(d) = 4.387
d = (4.387)^2
d = 19.246!
Took me a while to get it through my...
vt is equal to the distance, but the trouble I am having is that the distance, d, that i am attempting to find is equal to the length of the string, l. So i must either be using the wrong formula, or some key piece of information is escaping me.
This is where I am at right now, using the...
Homework Statement
Two children are sending signals along a cord of total mass 0.54 kg tied between tin cans with a tension of 37 N. It takes the vibrations in the string 0.53 s to go from one child to the other. How far apart are the children?
Express your answer using two significant...