SOLVED:A thin spherical shell of mass 4.00 kg and diameter 0.200 m is filled with helium (density =0.180 kg / m^3 ) . It is then released from rest on the bottom of a pool of water that is 4.00 m deep. (a) Neglecting frictional effects, show that the shell rises with constant acceleration and determine the value of that acceleration. (b) How long will it take for the top of the shell to reach the water surface?
SOLVED:A thin spherical shell of mass 4.00 kg and diameter 0.200 m is filled with helium (density =0.180 kg / m^3 ) . It is then released from rest on the bottom of a pool of water that
A thin spherical shell of mass 4.00 kg and diameter 0.200 m is filled with helium (density =0.180 kg / m^3 ) . It is then released from rest on the bottom of a pool of water that is 4.00 m deep. (a) Neglecting frictional effects, show that the shell rises with constant acceleration and determine the value of that acceleration. (b) How long will ...
numerade.com2019年11月11日
Helium Balloons
Helium balloons
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氦气球 （Helium Balloons) 与 氢气球 （Hydrogen Balloons) 的区别。。。。脾气火爆的氢气 #botaktong #delonballoons #balloon #气球 #氦气 #氢气 #跟戴博士一起做实验 #化学实验 #知识科普 #氢气球爆炸 #知识前沿派对 | Terence Tong
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氦气球 （Helium Balloons) 与 氢气球 （Hydrogen Balloons) 的区别。。。。脾气火爆的氢气 #botaktong #delonballoons #balloon #气球 #氦气 #氢气 #跟戴博士一起做实验 #化学实验 #知识科普 #氢气球爆炸 #知识前沿派对 | Terence Tong
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What is the minimal mass of helium density 0.18 kg/m³ needed t... | Filo
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VIDEO solution:A 3.2- kg balloon is filled with helium (density =0.179 kg / m^3 ). If the balloon is a sphere with a radius of 4.9 m, what is the maximum weight it can lift? | Numerade
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SOLVED:(a) How much helium (density 0.18 kg / m^3 ) is needed to lift a balloon carrying two people, if the total mass of people, basket, and balloon (but not gas) is 280 kg ? (b) Repeat for a hot-air balloon whose air density is 10 % less than that of the surrounding atmosphere.
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A gas refrigeration cycle with a pressure ratio of 4 uses helium as the working fluid. The temperature of the helium is -6^∘ C at the compressor inlet and 50^∘ C at the turbine inlet. Assuming isentropic efficiencies of 85 percent for both the turbine and the compressor, determine ( a ) the minimum temperature in the cycle, (b) the coefficient of performance, and ( c ) the mass flow rate of the helium for a refrigeration rate of 25 kW. | Numerade
A gas refrigeration cycle with a pressure ratio of 4 uses helium as the working fluid. The temperature of the helium is -6^∘ C at the compressor inlet and 50^∘ C at the turbine inlet. Assuming isentropic efficiencies of 85 percent for both the turbine and the compressor, determine ( a ) the minimum temperature in the cycle, (b) the coefficient of performance, and ( c ) the mass flow rate of the helium for a refrigeration rate of 25 kW. | Numerade
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