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Mike
ratio of mass of aluminum you can lift to mass of lead that you can lift underwater?
Aluminum and lead have densities 2.8Pw and 11.3Pw, respectively, where Pw is the density of water. If the maximum mass of the lead that you can lift while underwater is M, what is the maximum for aluminum?
1 AnswerPhysics3 years agoPhysics (fluids) question?
The pressure at 11,000 meters (where most commercial airliners fly) is about a quarter of atmospheric pressure at sea level. Suppose you’re a passenger on a plane, flying at such an altitude but with the cabin pressurized to 1 atm, and you notice a gremlin on the wing. Suppose that the window near your seat isn’t screwed in and is held in place only by the difference in pressure. What force would the gremlin need to exert on your 40cm x 50cm window in order to get in?
1 AnswerPhysics3 years ago