A spherical balloon is filled with helium at sea level. Helium and bal – McqOptions

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1.	A spherical balloon is filled with helium at sea level. Helium and balloon material together weigh 500 N. If the net upward lift force on the balloon is also 500 N, what is diameter of the balloon?
A.	5.42 m
B.	6.78 m
C.	3.43 m
D.	2.34 m
Answer» B. 6.78 m

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