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A blimp is cruising slowly at low altitude, full as usual with helium gas. Its maximum useful payload, including crew and cargo is 1260 kg. The volume of the helium-filled interior space is 6960 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?
A 41.7kg boy and a 56.4kg girl are on the surface of a frozen lake, 14.0m apart. Calculate the magnitude of the boy's acceleration
A 82 person sits on a 3.5 chair. Each leg of the chair makes contact with the floor in a circle that is 1.5 in diameter. Find the pressure exerted on the floor by each leg of the chair
A spring is compressed by 0.0617 m and is used to launch an object horizontally with a speed of 2.58 m/s. at what angular frequency (in rad/s) would it oscillate
what the effects of electronic games on children - What were pros and cons of the research method(s) that was/were used and was the topic significant and relevant to education? Why/why not?
Two small objects are hung, from a point, on strings 50 cm long. they each have mass .06 grams and are given equal charge, What is the magnitude of the charge on each object
A hotel elevator ascends 110 {rm m} with a maximum speed of 4 {rm m/s}. Its acceleration and deceleration both have a magnitude of 1.20 {rm m/s^2}.
A pulse from a ruby laser (lambda = 694.3 nm) has an average power of 30 MW and lasts 2.9 ns. How many photons are emitted in this pulse
A 85 kilogram scaffold is 6.8 meter long. It is hanging with two wires, one from each end. Determine the tension in the right hand side wire
The electric potential in a certain area is given as: V = 3x^2 + 5yz. what is the electric field in the area
a 40g horizontal metal bar 12cm long is free to slide up and down between two tall vertical metal rods that are 12cm
A positively charged He+ atom has two protons in the nucleus and one electron in the shell. In a classic model of the atom, What is the radius of the orbit
two cars cover the same distance in a straight line. car a covers the distance at a constant velocity. car b starts
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