Hot Air Balloon Lift
February 11th, 2010 | 
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ART PRINT Poster Orange Hot Air Balloon Lifting Off |  |
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US $4.99 | 27d 17h 14m |
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VINTAGE STERLING BRACELET CHARM-ENAMELED HOT AIR BALLOON-$12.99 GIVE YOU A LIFT? | |
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US $12.99 | 19d 3h 28m |
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NEW 504 PIECE JIGSAW PUZZLE LIFT OFF HOT AIR BALLOONS | |
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US $8.99 | 8d 6h 36m |
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Hot Air Balloon Lift
How hot is the air in a Hot Air balloon?
How does it's lift relate to helium?
So what's a cubic foot of helium weigh? How about hydrogen?
Hot air balloons are based on a very basic scientific principle: warmer air rises in cooler air. Essentially, hot air is lighter than cool air, because it has less mass per unit of volume. A cubic foot of air weighs roughly 28 grams (about an ounce). If you heat that air by 100 degrees F, it weighs about 7 grams less. Therefore, each cubic foot of air contained in a hot air balloon can lift about 7 grams. That's not much, and this is why hot air balloons are so huge -- to lift 1,000 pounds, you need about 65,000 cubic feet of hot air.
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No items matching your keywords were found.
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ART PRINT Poster Orange Hot Air Balloon Lifting Off | |
|
US $4.99 | 27d 17h 14m |
|
VINTAGE STERLING BRACELET CHARM-ENAMELED HOT AIR BALLOON-$12.99 GIVE YOU A LIFT? | |
|
US $12.99 | 19d 3h 28m |
|
NEW 504 PIECE JIGSAW PUZZLE LIFT OFF HOT AIR BALLOONS | |
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US $8.99 | 8d 6h 36m |
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Crowds at a Hot Air Balloon Festival Await Balloon Lift Off $39.99 Paul Sutherland Crowds at a Hot Air Balloon Festival Await Balloon Lift Off - Photographic Print |
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Hot Air Balloon Being Prepared for Lift Off, New York, USA $24.99 Paul Sutton Hot Air Balloon Being Prepared for Lift Off, New York, USA - Photographic Print |
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Hot Air Balloon $19.99 Hot Air Balloon - Premium Poster |
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Hot Air Balloon at the Hot Air Balloon Festival $39.99 Richard Nowitz Hot Air Balloon at the Hot Air Balloon Festival - Photographic Print |
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Red hot air balloon $44.99 Red hot air balloon - Giclee Print |
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Early Hot-Air Balloon $14.99 Early Hot-Air Balloon - Premium Poster |
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Blue Hot Air Balloon $19.99 Avalisa Blue Hot Air Balloon - Premium Poster |
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Large hot air balloon and small hot air balloon $34.99 Large hot air balloon and small hot air balloon - Giclee Print |
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Hot Air Balloon Being Prepared for Lift Off. Hudson Valley, New York, New York, USA $24.99 Paul Sutton Hot Air Balloon Being Prepared for Lift Off. Hudson Valley, New York, New York, USA - Photographic Print |
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Hot Air Balloon in Flight $24.99 Paul Sutton Hot Air Balloon in Flight - Photographic Print |
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Hot Air Balloon 1 $29.99 Gene Cyr Hot Air Balloon 1 - Photographic Print |
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Hot Air Balloon - Lift Off - Ride Setup and Takeoff
Physics Hot air balloon question?
A 5.40 10^2 kg hot-air balloon takes off from rest at the surface of the earth. The wind and lift forces take the balloon up, doing +9.70 10^4 J of work on the balloon in the process. At what height above the surface of the earth does the balloon have a speed of 8.70 m/s?
can someone tell me how to do ths?
Do this with conservation of energy. The energy (work) in lifting the balloon to height h and velocity v is
W = m*g*h + 0.5*m*v². (Potential energy plus kinetic energy.)
You are given w = 9.7*10^4 J, and m = 5.40*10^2 kg and v = 8.70 m/s. Solve for h
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