Suppose you lift a 20 kg box by a height of 1.0 m.
a. how much work do you do in lifting the box

Frost wedging occurs when water seeps into a crack in a rock, freezes, and causes the crack in the rock to widen. t or f

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

Which statement correctly describes the current in a circuit that is made up of any two resistors connected in parallel with a battery? a. the current in the battery and in each resistor is the same b. the current the battery equals to the sum of the currents in the resistors c.the current in the battery is less than the current in either resistor d. the current in the battery equals to the product of the currents in the resistors