A student releases a ball from a height of 100cm above the ground. The ball bounces to a height of 80cm. The diagram below show’s position at five different times from its starting point to its maximum height after the first bounce.

What problem would a person have if the nucleic acid in one of his or her cells were damaged?

In a reaction (at equilibrium) that makes more moles of gas than it consumes, what is the effect of increasing the pressure?

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?