On a aircraft carrier, a fighter jet goes from rest to a velocity of 250 mph (miles per hour) when it takes off. It does this in 3 seconds. What is it acceleration ?

37.25m/s

Explanation:

Acceleration is the change in velocity of an object with respect to time.

Acceleration = velocity/time

Given

Velocity = 250mi/hr

Convert to m/s

1mile = 1609.344m

1hr = 3600s

250mi/hr = 250mi * 1609.344/1 * 3600

250mi/hr = 402366/3600

250mi/hr = 111.76m/s

Time = 3 seconds

Get the acceleration:

Acceleration = 111.76/3

Acceleration = 37.25m/s

Hence the acceleration is 37.25m/s

b

explanation:

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .