1. The pressure at a point in a liquid is proportional to the _______ of the liquid and the depth of the point.   area   density   force   gravitational acceleration   Hint Half-n-half Clue   2. Soap bubbles are spherical in shape because   air exerts equal pressure in all directions   spherical shape has the highest ratio of surface area to volume   soap film has a low surface tension   air trapped inside the bubble has low pressure   Half-n-half Clue   3. The average atmospheric pressure at sea level is 760 mm Hg. If the relative density of mercury is 13.6, then the air pressure can support _______ m of vertical length of a water column at sea level.   101396   10.336   0.76   10336   Half-n-half Clue   4. 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 = 2 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   1.061 × 104dynes cm-2   1.016 × 107dynes cm-2   1.040 × 106dynes cm-2   2.666 × 104dynes cm-2   Half-n-half Clue   5. 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 water   filled with nitrogen   Half-n-half Clue   6. 21 litres of a gas at a pressure of 2 bar are compressed to 7 litres without any change in the temperature. The final pressure of the gas is about   6.0  bar   0.67 bar   21  bar   2.33  bar   Half-n-half Clue   7. 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.   1000   10000   100   100000   Half-n-half Clue