How loud is a gunshot? a. 120 decimals, b. 150 decimals, c. 100 decimals, or d. other answer. if d, describe what answer it is.

A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?

Asher cycles 12 miles in 16 hours. what is his speed?

Does anyone know how to solve this problem? i really need . i made an attempt but i just cant get it. a metal rod is 25.000 cm long at 25.0 degrees celsius. when heated to 102.0 degrees celsius, it is 25.054 cm long. what is the coefficient of linear expansion for this metal.