Both hydrogen gas and helium gas are lighter than air. why is helium used to lift blimps instead of hydrogen? a. helium has more lifting force than hydrogen because it has more electrons. b. hydrogen has less lifting force than helium because it has less mass. c. hydrogen has a tendency to lose an electron, decreasing lift. d. helium is more chemically stable than hydrogen and will not burn.

Which units can be used to measure length or distance? check all that apply. gram meter kilometer liter inch

Solar cell a produces 100 joules of energy, when a light source is shown on it for 3 minutes. solar cell b produces 200 joules of energy when the same light source is shown on it for 5 minutes. which solar cell works better? a) solar cell b, because it produces more energy. b) solar cell b, because it generates more power. c) solar cell a, because it produces energy quicker. d) solar cell a, because it generates a greater wattage. eliminate

Aspecimen of oil having an initial volume of 580cm^3 is subjected to a pressure increase of 4.0 mpa, and the volume is found to decrease by 0.40 cm^3. (a) what is the bulk modulus of the material? (b) what is the compressibility of the material?