The friends left on earth because they can see the total eclipse, where as you are on the moon witnessing sections get dark rather than the whole picture
Heat rises, and it is warmer at the equator, so I think warm air would rise at the equator and move towards the cooler poles.
The second statement is the correct choice. Don't make me type it out.
The first factor is wind speed, the second factor is wind duration, and the last factor is the fetch, the distance over which the wind blows without a change in direction.
all these factors determines the strength of a wave.
hope this helps :)
The reason as to why the substage condenser does not need to be included in computing the magnification and the only component needed is the ocular lens and the objective lenses is because the condenser is only responsible for gathering light and it does not contribute with the magnification of the object under the microscope.
