What force is required to keep a 245kg wood pallet moving at a constant speed across a concrete floor

What are segments of dna that code for a particular trait. a combination of dna and proteins make up what

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?

How does changing the frequency affect the energy of the wave?