Aspherical weather balloon is filled with hydrogen until its radius is 4.00 m. its total mass including the instruments it carries is 24.0 kg. (a) find the buoyant force acting on the balloon, assuming the density of air is 1.29 kg/m3. kn (b) what is the net force acting on the balloon and its instruments after the balloon is released from the ground? kn (c) why does the radius of the balloon tend to increase as it rises to higher altitude? because the external pressure with increasing altitude.
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Physics, 22.06.2019 00:50
Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?
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Physics, 22.06.2019 12:00
In an experiment, how can i change human errors? be specific.
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Physics, 22.06.2019 12:10
Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f
Answers: 2
Aspherical weather balloon is filled with hydrogen until its radius is 4.00 m. its total mass includ...
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