Explain why smoke particles in air move about faster if the temp of the air is increased??

What are the factors that affect the resistance of a wire?

Why don't you see your reflection in water with waves or repples

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n