When air is heated, it expands. The more it is heated, the more it expands. This can produce a pocket of air that is lighter than the pocket around it. If the gases in the air above two areas on Earth are similar, what happens when one area receives more sunlight than the other area?

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)

What energy is it when you flip on a switch on a lamp

Select the correct answer. wax is a nonpolar substance. in which type of substance is it most soluble?