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Solved: A spherical hot-air balloon is initially filled
Chapter 5, Problem 511(choose chapter or problem)
A spherical hot-air balloon is initially filled with air at and with an initial diameter of . Air enters this balloon at and with a velocity of through a 1-m diameter opening. How many minutes will it take to inflate this balloon to a 15-m diameter when the pressure and temperature of the air in the balloon remain the same as the air entering the balloon?
Questions & Answers
QUESTION:
A spherical hot-air balloon is initially filled with air at and with an initial diameter of . Air enters this balloon at and with a velocity of through a 1-m diameter opening. How many minutes will it take to inflate this balloon to a 15-m diameter when the pressure and temperature of the air in the balloon remain the same as the air entering the balloon?
ANSWER:
Step 1 of 6
A spherical hot-air balloon is considered. The time it takes to inflate the balloon is to be determined.
We assume that air is an ideal gas.
The gas constant of air is (Table A-1).