The end of a stopped pipe is to be cut off so that the pipe will be open. if the stopped pipe has a total length l, what fraction of l should be cut off so that the fundamental mode of the resulting open pipe has the same frequency as the fifth harmonic (n=5) of the original stopped pipe?
express your answer in terms of l.

We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?

Amachinist turns the power on to a grinding wheel, at rest, at time t = 0 s. the wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 96 rad/s. the wheel is run at that angular velocity for 40 s and then power is shut off. the wheel slows down uniformly at 1.5 rad/s2 until the wheel stops. in this situation, the time interval of deceleration is closest to:

The junction rule describes the conservation of which quantity? note that this rule applies only to circuits that are in a steady state.