How much time (as a fraction of the period t) does it required for a wave’s crest (maximum) to reach the position where the trough (minimum) was at t = 0?

Explanation:

From the billow figure the wave required T time to complete the length

Now from the figure it is clear that the length between the maximum crest and minimum crest is

As the distance is decreases by 4 times so the time will alos decreases by 4 times

So the required time for a wave to reach from maximum crest to minimum crest is

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.​