How high would the 1.5-kg ball have to be above the ground to have a potential energy of 450 J?(Hint: PE formula, solving for "h")

Which is not true about oxygen-17 and oxygen-18?

How do you tell if someone actually cares about you? and just say they do?

Astone weighing 1.5 kilograms is resting on a rock at a height of 20 meters above the ground. the stone rolls down 10 meters and comes to rest on a patch of moss. the gravitational potential energy of the stone on the moss is joules.