_________is the stainless steel used in beer kegs.
Fill in the blank(s) with the appropriate word(s).
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Estimate the volume of a helium-filled balloon at STP if it is to lift a payload of 450 kg. The density of air is 1.29 kg/m3 and helium has a density of 0.178 kg/m3
a. 2 500 m3 b. 310 m3 c. 410 m3 d. 350 m3 e. 500 m3
A 2-kg rifle is horizontally suspended by a pair of strings so that recoil can be measured. The rifle fires a 0.001-kg bullet at a speed of 200 m/s. The recoil velocity of the rifle is about
A) 0.001 m/s. B) 0.01 m/s. C) 0.1 m/s. D) 1 m/s. E) none of the above
An airplane flies in a semi-circular arc in order to simulate “weightlessness” for its occupants. If the radius of the semicircular path it flies is 3500 m, what is the speed at which the plane flies?
A. 357 m/s B. 580 m/s C. 185 m/s D. 1180 m/s
As you make a right-hand turn in your car, you are pushed against the door to your left.pushed against the door to your left. This is because
A. the centrifugal force pushed you to the left. B. no force pushed you to the right.