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Chapter 15: Problem 10
Why do airplanes take off into the wind?
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A plumber comes to your ancient apartment building where you have a part-time job as caretaker. He's checking the hot-water heating system, and notes that the water pressure in the basement is 18 psi. He asks, "How high is the building?" "Three stories, each about 11 feet," you reply. "OK, about 33 feet," he says, pausing to do some calculations in his head. "The pressure is fine," he declares. On what basis did he come to that conclusion?
A helium-filled balloon stops rising long before it reaches the "top" of the atmosphere, but a cork released from the bottom of a lake rises all the way to the surface. Why the difference?
What's the density of a fluid whose pressure increases at the rate of \(100 \mathrm{kPa}\) for every \(8.0 \mathrm{~m}\) of depth?
The diamond anvil is used by scientists and engineers to study matter under extreme pressures, simulating conditions such as those found at the centers of planets. A typical anvil consists of two diamonds with parallel faces measuring some \(200 \mu \mathrm{m}\) in diameter. The sample under study is placed between the diamonds, and a force is applied to the diamonds. Estimate the pressure that results when the force on the diamonds is \(6 \mathrm{kN}\).
Why are dams thicker at the bottom than at the top?
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