(Challenge Problem) A worker pulls a 40.0-kg crate with a rope at the 30.0o angle to the horizontal. The coefficient of sliding friction between the crate and the floor is 0.55. If he moves the crate
with a constant velocity a distance of 7.00 m, how much work does the worker do on the crate?
(hint: make 2 equations for 2 unknowns)

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.​

pretty sure it's false

i believe the answer is electric potential.

explanation: