A ball at the top of a 25 meter hill has a mass of 18 kg. How much potential 1 poin energy does it have?

PE= 4500 J GPE=mgh so you do GPE= (18kg)(10m/s^2)(25m) the 10m/s^2 is the amount of gravity on earth

Molybdeum(mo)orruthenium (ru)actually, elements with similar chemical properties as technetium would bemn, re, and bh. this is because elements in the same group/family (column) have similar chemical properties. elements in the same period (row) have the same number of energy levels (or shells).

Answer///(d) atoms contain small,negatively charged particles;