In which medium would sound travel the fastest? a)across a room b)in a swimming pool c)through outer space d)through a railroad track

Energy is the ability to do work which measures what

Idon’t quite understand this problem

A2-kg bowling ball is 2.5 meters off the ground on a post when it falls. just before it reaches the ground, it is traveling 7 m/s. assuming that there is no air resistance, which statement is true?