Asource of sound is kept in a jar in a vacuum .air is slowly introduced to the jar .
what happened to the sound coming out of the jar

Power can be defined as a. the distance over which work was done. b. how much work can be done in a given time. c. all the work in an given area. d. the energy required to do work.

How is the gravitational force related to the distance between two objects?

What is the measure of how much matter is in an object and that can be measured using a balance? a. height b. volume c. weight d. mass