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Physics, 26.11.2019 02:31, Hailey1313131313
Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. what percent (by moles) of he is present in a helium-oxygen mixture having a density of 0.518 g/l at 25 ∘ c and 721 mmhg ?
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Physics, 22.06.2019 20:30, helpmeplz33
The great sandini is a 60.0-kg circus performer who is shot from a cannon (actually a spring gun). you don’t find many men of his caliber, so you him design a new gun. this new gun has a very large spring with a very small mass and a force constant of 1100 n/m that he will compress with a force of 4400 n. the inside of the gun barrel is coated with teflon, so the average friction force will be only 40.0 n during the 4.00 m he moves in the barrel. at what speed will he emerge from the end of the barrel, 2.50 m above his initial rest position?
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