A man float with a chair 193 miles with 105 heliums balloons (http://www.msnbc.msn.com/id/19694083/) Assuming that mars gravity is one third of earth ....What volume or balloon size is needed to airborn one kilo of instrument on Mars atmosphere
2007-12-16 08:51:41 · 3 answers · asked by fernando19562000 2 in Science & Mathematics ➔ Astronomy & Space
The amount of gravity is irrelevant. It only depends on the density of Helium relative to Mars' atmospheric pressure. If the mass of the balloon plus the instrument balances the mass of the air displaced by the balloon, it will float. It would be the same thing with a balance. If you put 3 kg on the left side of the balance and 3 kg on the right side, it will be balanced, no matter how strong or weak the gravity is.
The atmosphere of Mars is 96% Carbon Dioxide, whose density is .0158 g/L at 0.8 kPa pressure. Helium's density at that pressure is .0014 g/L. Ignoring the empty weight of the balloon itself, the volume of the Helium needs to displace enough CO2 equal to its own weight plus 1 kg. For a volume v (in Liters):
.0158v = .0014v + 1000
.0144v = 1000
v = 69444 L
Multiplying this by .0014 gives 97.222 g of Helium.
The balloon needs to be filled with about 97 g of Helium and needs to have a volume of about 69 cubic meters. For a spherical balloon, this means a radius of about 2.5 meters.
2007-12-16 08:57:24 · answer #1 · answered by dogwood_lock 5 · 1⤊ 0⤋
Earth balloon should have a diameter of 20 centimeters (cm) ... The Moon should be about 5 cm and Mars about 11 cm. ...
2007-12-16 16:59:01 · answer #2 · answered by Anonymous · 0⤊ 1⤋
gravity doesn't play much into it.
you must take in consideration the pressure in mars' atmosphere.
2007-12-16 17:37:22 · answer #3 · answered by Mercury 2010 7 · 0⤊ 0⤋