An object has 1200 J of gravitational potential energy when it is dropped. Right when the object hits the ground how much kinetic energy does it have?

Aray diagram for a refracted light day is shown. what does the dashed line represent

Will give brainliest! which statement best describes the difference between strong nuclear forces and weak nuclear forces? weak nuclear forces are involved when certain types of atoms break down. strong nuclear forces are responsible for holding atoms' nucleus together. weak nuclear forces hold bonds between atoms together. strong nuclear forces hold together the nucleus of an atom. strong nuclear bonds prevent atoms from falling apart. weak nuclear bonds prevent compounds from falling apart. strong nuclear forces are involved in breaking electrons from their shells. weak nuclear forces hold protons in the nucleus.

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects