Find the volume of a sphere which has 4 cm diameter

In what direction does the medium move relative to the direction of the wave? explain.

The position of a crate sliding down a ramp is given by x=(0.05t^3) m, y=(1.7t^2) m, z=(6−0.85t^5/2) m, where t is in seconds. (a) determine the magnitude of the crate's velocity when t = 2 s. (b) determine the magnitude of the crate's acceleration when t = 2 s.

An object's buoyant force and weight mean the same thing.a. trueb. false