Yes. The ammunition in a pistol does not require outside air in order to fire; it gets all the oxygen it needs from the nitrates in the cartridge, so gunpowder would still work on the moon.
It depends what mechanism they use. An air pistol which uses compressed air would work, but any mechanism which needs ignition (e.g. a traditional firearm where the bullet is propelled by gunpowder) or an external air source would not.
Actually it would because one of the ingredients in gun powder is potassium nitrate which is an oxidising agent. This supplies the powder with the oxygen it needs to burn of "deflagrate". Guns can, but shouldn't be fired underwater, so yes you can fire a gun on the moon.
A spring balance would work on the moon but would first have to be re-calibrated for the moons lower gravity.
yes unless you're on the darkside on the moon
A solar powered heating unit may or may not work on the moon
It depends what mechanism they use. An air pistol which uses compressed air would work, but any mechanism which needs ignition (e.g. a traditional firearm where the bullet is propelled by gunpowder) or an external air source would not.
Actually it would because one of the ingredients in gun powder is potassium nitrate which is an oxidising agent. This supplies the powder with the oxygen it needs to burn of "deflagrate". Guns can, but shouldn't be fired underwater, so yes you can fire a gun on the moon.
Yes, your balance would not be affected on the moon.
A spring balance would work on the moon but would first have to be re-calibrated for the moons lower gravity.
yes
A hot air balloon would not work on the moon.
yes unless you're on the darkside on the moon
Yes
A solar powered heating unit may or may not work on the moon
it is not close enough
Yes, solar power reaches the moon.
Yes it would only if we could try it.