What surprises you about ancient belief systems about the age of the universe?

If the speed of a particle triples ,by what factor does its kinetic energy increase?

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

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