A blimp is cruising slowly at low altitude, filled as usual with helium gas. Its

Question

A blimp is cruising slowly at low altitude, filled as usual with helium gas. Its maximum useful payload, including crew and cargo, is 1.80E+3 kg. The volume of the helium-filled interior space is 7.40E+3 m3. The density of helium gas is 0.16 kg/m3, and the density of hydrogen is 0.081 kg/m3. How much more payload could the blimp carry if you replaced the helium with hydrogen?

In the figure, a spring of spring constant 3.10 x 104 N/m is between a rigid beam and the output piston of a hydraulic lever. An empty container with negligible mass sits on the input piston. The input piston has area Ai, and the output piston has area 12.0Ai. Initially the spring is at its rest length. How many kilograms of sand must be (slowly) poured into the container to compress the spring by 7.20 cm?

Explanation / Answer

# Given payload(He)=1800 kg, V=7400 m

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