A 250 kg rock falls off a cliff and comes to rest on the ground, which is 42 m below the cliff.
At what point is the rock’s potential energy at maximum? How much P. E. does it have at this point?

Acamcorder has a power rating of 17 watts. if the output voltage from its battery is 7 volts, what current does it use?units:

What is i fracture in the crust called when land move up, down or sideways

Draw any one of the skeletal structures of a 2° alkyl bromide having the molecular formula of c6h13br and two stereogenic centers. indicate chirality by using wedge and hashed wedge notation. lone pairs do not need to be shown.