Which of the following microscope parts should routinely be adjusted to control the light source and provide optimal illumination of the specimen?

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine

Abag of potato chips contains 2.00 l of air when it is sealed at sea level at a pressure of 1.00 atm and a temperature of 20.0 deg c. what will be the volume of the air in the bag if you take it with you, still sealed, to the mountains where the temperature is 7.00 deg c and atmospheric pressure is 70.0 kpa? assume that the bag behaves like a balloon and that the air in the bag is in thermal equilibrium with the outside air.

Why does lightning travel from clouds to the ground?