Aspring with a spring constant of 4.0 newtons
per meter is compressed by a force of
1.2 newtons. what is the total elastic potential
energy stored in this compressed spring?
(1) 0.18 j (3) 0.60 j
(2) 0.36 j (4) 4.8 j

Astudent is performing an experiment comparing sound and light waves. the student gathers the following data. what conclusion does the student most likely make based on this data? light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through. all sound waves always have the same energy, so the temperature of the medium does not affect wave speed. light needs to vibrate particles, so it travels fastest in tightly packed solids, while sound does not need a medium, so it travels fastest in a gas. tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

1kg of water needs to recieve 4200j of energy to go from 90 degrees to 91 degrees. what is the specific heat capacity of water? what are the units?