You place a balloon in a closed vacuum chamber at standard temperature and pressure (stp). you decrease the pressure in the chamber by half but keep the temperature constant. what happens to the volume of the balloon?
a. it stays the same volume.
b. it doubles in volume.
c. it reduces in size by half the original volume.

The picture represents the process that produces most of the energy used by living organisms on earth. which process is represented in the picture? a) the magnetic attraction between two hydrogen nuclei. b) the fusion of hydrogen nuclei to produce a helium nucleus in the core of the sun. c) the fission of hydrogen nuclei to produce a helium nucleus in the core of the sun. d) the chemical reaction between hydrogen nuclei to produce a helium nucleus in earth's atmosphere.