Consider a minivan the roof of which can be approximated as a flat plate, 2.1 m wide and 3.5 m long. The sun beats down on the roof such that the net solar radiation absorbed is 2800 W. If the ambient air is 25ºC, the car is moving at 90 km/h, and the inside surface of the roof is heavily insulated, determine the steady-state temperature of the roof. Ignore radiation emitted from the roof and assume that the roof temperature is uniform along the minivan.

hello there!

your answer is a “generator”

a generator does not create energy but instead it transforms it.

it’s basically a motor working in reverse.

what was the acceleration of the 2 kg cart?

⇒ 16.0 cm/s2

what was the acceleration of the 4 kg cart?

⇒ 8.1 cm/s2

what was the acceleration of the 6 kg cart?

⇒ 5.3 cm/s2

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.

b. a lightning bug, plug of grass, and a worm