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Chapter 14: Q.6 (page 384)
The deepest point in the ocean is 11 km below sea level, deeper than Mt. Everest is tall. What is the pressure in atmospheres at
this depth?
The pressure is 1096 atm
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Disk brakes, such as those in your car, operate by using pressurized oil to push outward on a piston. The piston, in turn, presses brake pads against a spinning rotor or wheel, as seen in. Consider a industrial grinding wheel, in diameter, spinning at . The brake pads are actuated by diameter pistons, and they contact the wheel an average distance from the axis. If the coefficient of kinetic friction between the brake pad and the wheel is , what oil pressure is needed to stop the wheel in ?
A long horizontal tube has a square cross-section with sides of width .
A fluid moves through the tube with speed . The tube then changes to a circular cross-section with a diameter. What is the fluid's speed in the circular part of the tube?
Glycerin is poured into an open U-shaped tube until the height in both sides is . Ethyl alcohol is then poured into one arm until the height of the alcohol column is . The two liquids do not mix. What is the difference in height between the top surface of the glycerin and the top surface of the alcohol?
The two identical beakers in FIGURE Q14.9 are filled to the same height with water. Beaker B has a plastic sphere floating in it. Which beaker, with all its contents, weighs more? Or are they equal? Explain.
What is the height of a water barometer at atmospheric
pressure?
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