Billy left some rocks outside in the sun. after many hours, they got hot. when he went inside for the night, he left them outside. what will happen to the rocks as they stay out all night?

Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?

What is the single most important equation in all of physics?

Diverging mirrors and lenses always produce images