The graph shows the acceleration of the cart with three
different fan speeds. the fan provides the force
necessary to accelerate the cart.
as the fan speed increases, the acceleration of the cart
the type of relationship that exists between the force
applied to the cart by the fan and the acceleration of
the cart is
relationship.

Explanation:

We know that the rate of change of velocity is called acceleration of an object. Its expression is given by :

The force acting on an object is the product of mass and acceleration. It is given by :

F = ma

It is clear that as the fan speed increases, the acceleration of the cart increases. Also from the Newton's second law of motion, the force  applied to the cart by the fan and the acceleration of the cart has direct relationship.

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.

d. platinum would have the greatest temperature increase because it has the lowest specific heat.