velocity=displacement/time
displacement=∆velocity x ∆time
displacement=4x4
16m
westerlies
polar easterlies and trade winds are in a different type
Slope of a curve Y plotted against X is mathematically given as

now here we can see that if similarly graph is plotted against distance and time then slope is given as

here we can say that above is ratio of small distance and very small interval of time.
so here we can say that this ratio of distance and time for very small interval of time is known as instantaneous speed of the object which is falling freely under gravity.
So here slope of the graph will represent the speed at a given instant.
Explanation:
the heat required to raise the temperature of the unit mass of a given substance by a given amount (usually one degree).
We know, Power = Voltage * Current
P = 660 * 12 = 7920 watt
In short, Your Answer would be Option A
Hope this helps!