1. Air is trapped in the space (labeled A) above the mercury level in the tube of a barometer, which measures 745 mm Hg. If the atmospheric pressure is 760 mm Hg, then the pressure of the trapped air is   between 745 and 760 mm Hg   745 mm Hg   760 mm Hg   15 mm Hg   Hint Half-n-half Clue   2. One arm of a glass U-tube is open to the atmosphere, whereas the other vertical arm is connected to a gas supply. The difference in levels of mercury (density = 13.6 g cm-3) between the vertical arms of the U-tube manometer is h = 1 cm. If the atmospheric pressure is 760 mm Hg and the gravitational acceleration is 9.8 m s-2, then the pressure of the gas is about   1.047 × 104dynes cm-2   1.014 × 107dynes cm-2   1.333 × 104dynes cm-2   1.026 × 106dynes cm-2   Half-n-half Clue   3. If a pressure of  7 Pa acts on 2 m2 of area, then the force acting on the surface is   14 N   3.50dynes   14dynes   3.50 N   Half-n-half Clue   4. To measure the atmospheric pressure, the space (labeled A) above the mercury level in a barometer tube is   essentially vacuum   filled with air   filled with nitrogen   filled with water   Half-n-half Clue   5. 6 bars = _______ millibars   0.6   60   0.006   6000   Half-n-half Clue   6. If the average atmospheric pressure at sea level can support 10.34 m of vertical length of a water column, then its magnitude is about _______ Pa. Assume density of water = 1 g cm−3 and gravitational acceleration = 9.8 m s−2.   100000   10000   100   1000   Half-n-half Clue   7. If the density of liquid A (carbon tetrachloride) is 1.6 g cm-3 and its height hA = 26.6 cm, then the density of oil B of height hB = 50 cm in the U-tube is about   0.33 g cm-3   0.85 g cm-3   1.18 g cm-3   3.01 g cm-3   Half-n-half Clue