What is the wave velocity if the wave length is 100 cm and the frequency is 2 Hz?

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.

Which word expression describes how much to calculate pressure

What are the dimensions of the cross section that passes through the points a, f, g, and d?