Chapter 18: Q. (page 511)
A hollow aluminum sphere with outer diameter 10.0 cm has a
mass of 690 g. What is the sphere’s inner diameter?
The solution gives the aluminium sphere and its inner diameter.
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An element in its solid phase has mass density 1750 kg/m3
and number density 4.3
The atomic mass number of copper is A = 64. Assume that atoms in solid copper form a cubic crystal lattice. To envision this, imagine that you place atoms at the centers of tiny sugar cubes, then stack the little sugar cubes to form a big cube. If you dissolve the sugar, the atoms left behind are in a cubic crystal lattice. What is the smallest distance between two copper atoms?
The semiconductor industry manufactures integrated circuits in large vacuum chambers where the pressure is 1.0 * 10-10 mm of Hg.
a. What fraction is this of atmospheric pressure?
b. At T = 20C, how many molecules are in a cylindrical chamber 40 cm in diameter and 30 cm tall?
The U-shaped tube in FIGURE P18.57 has a total length of . It is open at one end, closed at the other, and is initially filled with air at pressure.
Mercury is poured slowly into the open end without letting any air escape, thus compressing the air. This is continued until the open side of the tube is completely filled with mercury. What is the length of the column of mercury?
Two students each build a piece of scientific equipment that uses a 655 mm-long metal rod. One student uses a brass rod, the other an invar rod. If the temperature increases by C, how much more does the brass rod expand than the invar rod?
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