JAMB - Physics (2012 - No. 13) | ExamPlay

JAMB - Physics (2012 - No. 13)

A balloon whose volume is 300m³ is filled with hydrogen. If the density of air is 1.3 kgm^-3, find the upthrust on the balloon. [g = 10ms^-2]

3000N

3800N

3900N

4200N

설명

F = mg = D x V x g = 1.3 x 300 x 10 = 3900

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