How much power (in watts) is produced by a stream with a discharge (volume flux) of 2.00 m/second and a velocity of 2.00 m/second. (note: the density of water is 1.00 g/em) (hint: do not be afraid to rearrange some of the basic equations for energy or to substitute one equivalent relationship in for another. pay close attention to the units) (hint #2: one way to think about this is that it involves the rate of producing kinctic enery-i. e. energy per unit time.) (i pt) 4. another boulder, with a mass of 10.0 kg, rests at the rim of a 0.030 km high cliff. how much gravitational potential energy (expressed in joules) does it have (relative to the base of the cliff)? (i pt) now, the boulder falls from the cliff. if all of the potential energy is converted into kinetic energy, what is the maximum velocity of the object (i. e., the instant before it hits the ground)? hint: compare the formulae for kinetic and potential energy.) (1 pt) what is the average velocity (hint: it starts with a velocity of how long does it take to ach the ground?