1. If the density of liquid A (carbon tetrachloride) is 1.6 g cm-3 and its height hA = 28.1 cm, then the density of oil B of height hB = 50 cm in the U-tube is about   0.90 g cm-3   2.84 g cm-3   1.11 g cm-3   0.35 g cm-3   Hint Half-n-half Clue   2. 6 bars = _______ millibars   60   0.6   6000   0.006   Half-n-half Clue   3. With increase in altitude, the pressure of the atmosphere   remains constant   may increase or decrease   decreases   increases   Half-n-half Clue   4. A _______ measures the pressure in terms of the difference in fluid levels between the vertical arms of a glass U-tube.   Sphygmomanometer   Manometer   Hydrometer   Barometer   Half-n-half Clue   5. What instrument is used for measuring atmospheric pressure?   Sphygmomanometer   Barometer   Hydrometer   Hygrometer   Half-n-half Clue   6. Pressure is defined as   force / area   mass / volume   mass × acceleration   force × distance   Half-n-half Clue   7. 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   2.666 × 104dynes cm-2   1.016 × 107dynes cm-2   1.040 × 106dynes cm-2   Half-n-half Clue