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Chapter 14: Q. 6 (page 383)
Rank in order, from largest to smallest, the densities of blocks a, b, and c in FIGURE Q14.6. Explain.
Density in descending order is ρa> ρc > ρb
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One day when you come into physics lab you find several plastic hemispheres floating like boats in a tank of fresh water. Each lab group is challenged to determine the heaviest rock that can be placed in the bottom of a plastic boat without sinking it. You get one try. Sinking the boat gets you no points, and the maximum number of points goes to the group that can place the heaviest rock without sinking. You begin by measuring one of the hemispheres, finding that it has a mass and a diameter of . What is the mass of the heaviest rock that, in perfectly still water, won't sink the plastic boat?
Styrofoam has a density of . What is the maximum mass that can hang without sinking from a Styrofoam sphere in water Assume the volume of the mass is negligible compared to that of the sphere.
A 2000 N force stretches a wire by 1 mm. A second wire of the same material is twice as long and has twice the diameter. How much force is needed to stretch it by 1 mm? Explain
Gas flows through the pipe of FIGURE Q14.10. You can’t see into the pipe to know how the inner diameter changes. Rank in order, from largest to smallest, the gas speeds va , vb , and vc at points a, b, and c. Explain.
What does the top pressure gauge read in
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