Sue can easily lift a 60-N rock with the help of a lever. When she pushes down with 20 N of force, she lifts the rock .75 meters. how far does she move her arm to do this?

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?

Determine el momento angular de un rueda de 3000g moviendose a 10m/s con un radio de giro de 400cm

When a bicycle coasts uphill, it moves slower and slower as it climbs. why? a. its kinetic energy is transforming into heat energy. b. its potential energy is transforming into kinetic energy. c. its kinetic energy is transforming into potential energy and heat energy. d. its potential energy is transforming into kinetic energy and heat energy.