Which is a disadvantage of using wind as an energy source? It may be unreliable.
It is not naturally occurring.
It produces a lot of waste.
It generates large amounts of electricity.

Ascrew incorporates which other simple machine? lever wheel and axle inclined plane pulley

If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 380j of energy to the room?

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter