Why does the moon appear to change shape?

a: it rotates and makes it own light

b: it moves closer and farther away from the earth in a yearly pattern.

c: it reflects sunlight as it revolves around the earth.

d: it stays in one position as the earth moves.

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?

What will happen in a hybrid vehicle if current flow becomes too high due to a short?

Calculate the numbers of photons having a wavelength of 10.0 mm required to produce 1.0 kj of energycalculate the numbers of photons having a wavelength of 10.0 mm required to produce 1.0 kj of energy