Brandon buys a new Seadoo. He goes 12 km north from the beach. He jumps waves for 6 km to the east. What distance did he cover?

State one advantage and one disadvantage of using a plane mirrior as a driving mirrior

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?

Aboy with a mass 25 kg climbs into a small tree. he sits on a branch that is 2.o m above to the ground.what is his gravitational potential energy above the ground?