3.
Mechanical energy is the sum of the
energy of an object.
O kinetic and potential
O potential and thermal
O potential and chemical
kinetic and chemical

"i have always loved contemporary art and made it a general goal to work within the field. after a few nonprofit internships at museums and galleries, i decided to try the for-profit art world and was offered a job as the ad assistant at the magazine. i much prefer the pace of the for-profit art community and have stayed with the company for three years, with a promotion to an account manager last spring."

i just did this and got a 100.

photocells convert light energy to electricity

pe = weightxheight = 2000x1000=2,000,000joules

gravity

explanation: