An ordinary gasoline can measuring 30.0 cm by 25.0 cm by 20.0 cm is evacuated with...
An ordinary gasoline can measuring 30.0 cm by 25.0 cm by 20.0 cm is evacuated with a vacuum pump.Assuming that virtually all of the air can be removed from inside the can, and that atmospheric pressure is 14.7 psi, what is the total force (in pounds) on the surface of the can?
Homework Answers
Find the surface area of can
Convert to inches
20*25*2 + 30*25*2 + 30*30*2 = 3700 sq.cm
=3700 cm^2
Convert cm ^2 to inche^2
1 cm^2 = 0.155 in^2
So 3700 cm^2 = 573.5 in^2
Pressure = force / area
Force = pressure * area
Force = 14.7 psi * 573.5 in^2
Force = 8430.45 pounds
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