A playground merry-go-round with a mass of 105 kg and a radius of 1.4m is rotating with an angular frequency of 0.42 rev/s. What is the magnitude of its angular velocity in radians per second, after 17kg child gets onto it by grabbing its outer edge?

A-4.60 μc charge is moving at a constant speed of 6.80×105 m/s in the +x−direction relative to a reference frame. at the instant when the point charge is at the origin, what is the magnetic-field vector it produces at the following points.

A175 g lump of molten lead at its melting point (327 c) is placed into 55.0 g of water at 20.0 c. the specific heat of lead is 130.j/kg c and the hf of lead is 20,400 j/kg. when the lead and the water have reached equilibrium, what is the temperature of the mixture?

What is a carrier wave and how does it affect what you hear on the radio