The 12.0n block descends 0.75m. at constant speed. how much work is done on the 12.0n block by gravity?

By definition, the work is given by:

Where,

f: force acting in the direction of displacement

d: distance traveled

Substituting values we have:

Therefore, the work done is given by:

9 J of work is done on the 12.0n block by gravity

explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​

0.863333

86%

hope this