A45 kg ice skater at rest caught a 0.25kg ball, if the ice skater moved at 0.15 m/s after catching the ball, find the speed of the ball before he caught it.

How to tell if two objects are in thermal equilibrium 1.the objects have the same temperature 2.the objects are the same size 3.the objects are touching each other 4.the objects temperatures are changing

What structural formula represents 4 electrons shared between two atoms?

The inner planets or call terrestrial because they