Briefly explain how continuous and line spectrum is formed in X-rays.

The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?

Why does gravity have a lesser than grater effect on higher altitudes?

The flame produced by the burner of a gas (propane) grill is a pale blue color when enough air mixes with the propane (c3h8) to burn it completely. for every gram of propane that flows through the burner, what volume of air is needed to burn it completely? assume that the temperature of the burner is 195.0°c, the pressure is 1.05 atm, and the mole fraction of o2 in air is 0.210.