Ashot-putter puts a shot (weight=71.1n) that leaves his hand at adistance of 1.52m above the ground. (a) find the work done by thegravitational force when the shot has risen to a height of 2.13mabove the ground. (b) determine the change(δpe=pefinal-peinitial) in the gravitationalpotential energy of the shot.

need with b

Which of the following describes something an engineer would probably do first when developing new technology meant to reduce ocean pollution? o a. evaluate the benefits and challenges of using certain chemicals to purify water. o b. research new scientific findings in regard to ocean cleanup. o c. identify the need to reduce ocean pollution. o d. research what has been done in the past to clean up oceanic oil residue.

Density of salty water as compared to the density of pure water is(a) is less(b) is always equal(c) is always more(d) may be less or more

How many molecules are present in 3 mols of silicon dioxide (sio2)?