7. A stone is thrown horizontally with an initial speed of 10 m/s from a bridge. If air resis-
tance could be ignored, how long would it
take the stone to strike the water 80 m below
the bridge?
(A) 1 s
(B) 2 s
(C) 4s
(D) 6 s
(E) 8s

In which scenario is the least amount of work done on a crate? a force of 120 n moves it 25 m. a force of 115 n moves it 26 m. a force of 130 n moves it 22 m. a force of 125 n moves it 27 m.

Asap and show ! a 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?