Chapter 10: Q51P (page 260)
(II)Estimate the air pressure inside a category 5 hurricane, where the wind speed is 300 km/h (Fig. 10-52).
Short Answer
The air pressure inside a category 5 hurricane is \(96.78\;{\rm{kPa}}\).
Chapter 10: Q51P (page 260)
(II)Estimate the air pressure inside a category 5 hurricane, where the wind speed is 300 km/h (Fig. 10-52).
The air pressure inside a category 5 hurricane is \(96.78\;{\rm{kPa}}\).
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Get started for free(I) If the force \(F\) needed to move the wire in Fig. 10–34 is \(3.4 \times {10^{ - 3}}\;{\rm{N}}\), calculate the surface tension \(\gamma \) of the enclosed fluid. Assume \(l = 0.070\;m\).
Consider what happens when you push both a pin and the blunt end of a pen against your skin with the same force. Decide what determines whether your skin is cut—the net force applied to it or the pressure.
An object that can float in both water and in oil (whose density is less than that ofwater) experiences a buoyant force that is
(a) Greater when it is floating in oil than when floating in water.
(b) Greater when it is floating in water than when floating in oil.
(c) The same when it is floating in water or in oil.
A copper (Cu) weight is placed on top of a 0.40-kg block of wood (\({\bf{density = 0}}{\bf{.60 \times 1}}{{\bf{0}}^{\bf{3}}}\;{\bf{kg/}}{{\bf{m}}^{\bf{3}}}\) ) floating in water, as shown in Fig. 10–58. What is the mass of the copper if the top of the wood block is exactly at the water’s surface?
Figure: 10-58
A beaker of water rests on an electronic balance that reads 975.0 g. A 2.6-cm-diameter solid copper ball attached to a string is submerged in the water, but does not touch the bottom. What are the tension in the string and the new balance reading?
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