Question
In: Physics
A hot-air balloon with all accessories and passengers weighs 600 kg, and has a volume of...
A hot-air balloon with all accessories and passengers weighs
600 kg, and has a volume of 3800 m3 when filed completely. The
temperature of the outside air is 15°C, and the air pressure is
1.013 bar. R = 286.9 J/kgK for air.
a) What is the temperature of the air in the balloon necessary
for it to start to float?
b) What is the resulting upward force on the balloon if the
air inside is 2°C warmer than this minimum threshold?
c) Calculate question a) again, but now for an ambient
temperature of 25°C. Do you need more or less fuel to heat up the
air in the balloon? Why?
Answers: a) T = 57,6°C; b) R = 242 N; c) T’ = 70,8°C
Solutions
Expert Solution
we will require more fuel to lift the
balloon because now we have to increase the inside temperature to a
higher value i.e more heat must be supplied.
genius_generous answered 4 days agoRelated Solutions
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Information from Ballooning: The Complete Guide to Riding the
Winds, by Wirth and Young (Random House), claims that the air in
the crown should be an average of 100°C for a balloon to be in a
state of equilibrium. However, the temperature does not need to be
exactly 100°C. What is a reasonable and safe range of temperatures?
This range may vary with the size and...
How hot is the air in the top (crown) of a hot air balloon? Information from...
How hot is the air in the top (crown) of a hot air balloon?
Information from Ballooning: The Complete Guide to Riding the
Winds, by Wirth and Young (Random House), claims that the air in
the crown should be an average of 100°C for a balloon to be in a
state of equilibrium. However, the temperature does not need to be
exactly 100°C. What is a reasonable and safe range of temperatures?
This range may vary with the size and...
How hot is the air in the top (crown) of a hot air balloon? Information from...
How hot is the air in the top (crown) of a hot air balloon?
Information from Ballooning: The Complete Guide to Riding the
Winds, by Wirth and Young (Random House), claims that the air
in the crown should be an average of 100°C for a balloon to be in a
state of equilibrium. However, the temperature does not need to be
exactly 100°C. What is a reasonable and safe range of temperatures?
This range may vary with the size and...
How hot is the air in the top (crown) of a hot air balloon? Information from...
How hot is the air in the top (crown) of a hot air balloon?
Information from Ballooning: The Complete Guide to Riding the
Winds, by Wirth and Young (Random House), claims that the air in
the crown should be an average of 100°C for a balloon to be in a
state of equilibrium. However, the temperature does not need to be
exactly 100°C. What is a reasonable and safe range of temperatures?
This range may vary with the size and...
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