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Chapter 10: Q2P (page 260)
(I) What is the approximate mass of air in a living room 5.6脳 3.6脳 2.4m?
The mass of the air is 62.4 Kg.
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Two ships moving in parallel paths close to one another risk colliding. Why?
One arm of a U-shaped tube (open at both ends) contains water, and the other alcohol. If the two fluids meet at exactly the bottom of the U, and the alcohol is at a height of 16.0 cm, at what height will the water be?
(I) If the force \(F\) needed to move the wire in Fig. 10鈥�34 is \(3.4 \times {10^{ - 3}}\;{\rm{N}}\), calculate the surface tension \(\gamma \) of the enclosed fluid. Assume \(l = 0.070\;m\).
Why don鈥檛 ships made of the iron sink?
You put two ice cubes in a glass and fill the glass to the rim with water. As the ice melts, the water level
(a) Drops below the rim.
(b) Rises and water spills out of the glass.
(c) Remains the same.
(d) Drops at first, then rises until a little water spills out.
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