Which of the following is an example of an electromagnetic wave?
a. sunlight
b. an earthquake
c. the sound of kids playing
d. butterflies flying through the air

Asap and show ! a 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.

Calculate the volume of this regular solid. what is the volume of the cone? round your answer to the nearest hundredth

What is the change in internal energy if 20 j of heat is released from a system and the system does 50 j of work on the surroundings? a. -70 j b. 30 j c. -30 j d. 70 j