Homework Help: physics

Posted by Luc on Thursday, March 1, 2012 at 3:31am.

The density of helium is 0.179kgm3.A Baloon hs a capacity of 27m3 and a mas of 12.5kg whn empty.a)fnd the total mas of baloon n gas.b)if dnsity of air is 1.29 kgm3 wht mas of air is displacd by the baloon

physics - density - MathMate, Thursday, March 1, 2012 at 8:14am
Volume = 27 m^3
density=0.179 kg m^-3
mass of balloon = 12.5 kg
a.
Total mass of balloon and helium
= 27*0.179+12.5
= 17.3 kg
mass of air displaced, neglecting the

b.
volume of the material of the balloon
= 27 m^3 * 1.29 kg-m^-3
= 34.8 kg

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