A string is fixed at both ends and vibrating at 140 Hz, which is its third harmonic frequency. The linear density of the string is 4.6x10-3 kg/m, and it is under a tension of 2.3 N. Determine the length of the string.

This problem has been solved! see the answera non-uniform fire escape ladder is 6.0m long whenextended to the icy alley below. it is held at the top by africtionless pivot, and there is neglibible frictional force fromthe icy surface at the bottom. the ladder weighs 250n, and it'scenter of gravity is 2.0m along the ladder from the bottom. amother and child of total weight 750n are on the ladder 1.5m fromthe pivot. the ladder makes an angle θ with the horizontal.find the magnitude and direction ofa) the force exerted by the icy alley on the ladderb) the force exerted by the ladder on the pivotc) do your answers in part a and b depend on the angle?

What are atoms of the same element with varying number of neutrons

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?