A person pushes a 14. 5 kgkg lawn mower at constant speed with a force of 89. 0 nn directed along the handle, which is at an angle of 45. 0∘∘ to the horizontal.

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.​

the answer would be c

3. dark matter

empty space could also be a simple vacuum