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Crashed on the Moon, prioritize these 15 items?
Which items would you put before others in a situation where you have to trek 40km across the Moon’s surface during the lunar day. Keep in mind things such as lack of oxygen, one-sixth gravity and so on.
Item number 1 is the most important, down to number 15 least important.
The items, in no particular order:
Matches
Food Concentrate
Nylon Rope, 50m
Parachute silk
Portable heater unit
Two .45 caliber pistols
Dehydrated milk, one case
Two 50kg oxygen tanks
Star map, moon constellations
Compressed CO2
Magnetic Compass
20 litres of water
Signal flares
First Aid Kits, Injection Needles
Solar powered FM Reciever, transmitter.
By the way, assume you have a spacesuit. 
Silent, this is not my homework… I have already completed my list, and I have considered things such as magnetic field strength, oxygen, etc. Thank you for responding.
I need two other people’s lists for comparison.
Larian LeQuella, same to you. I’ve completed my list, and need other opinions 
1. Two 50kg oxygen tanks
Single most useful thing you can have. The good news is gravity is low so you’ll actually be able to carry them.
2. Parachute silk
Portable shade.
3. Solar powered FM Reciever, transmitter
You might hear something useful and you can let your destination know you’re coming.
4. Nylon Rope, 50m
While not terribly useful, it will help in getting your friend out of that crater.
The rest is really, really useless and should be left at the crash site.
Matches – No firewood, no air in space.
Food Concentrate – You’d have to take off your helmet to eat.
Portable heater unit – The moon lacks wall sockets.
Two .45 caliber pistols – Sadly you won’t even be able to commit suicide with these. They’ll vacuum weld and the explosives won’t go off without oxygen.
Dehydrated milk, one case – More food you can’t eat.
Star map, moon constellations – Navigating by the stars is a good way to get lost.
Compressed CO2 – Unless you have some kind of jump jet this has no obvious purpose.
Magnetic Compass – The moon has no magnetic field. This is a paperweight.
20 litres of water – Wow, this would be nice if you could take off your helmet and if it was below the boiling point.
Signal flares – Stuff doesn’t burn on the moon.
First Aid Kits, Injection Needles – Because you’re going to inject your partner through his spacesuit? Or are you supposed to McGyver something involving the water or the CO2?
EDIT: Hmm, you learn something new every day. The flares would burn as would the gunpowder.
I still suspect the gun will vacuum weld.
http://en.wikipedia.org/wiki/Cold_welding
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