1. An object floats in liquid L1, but it sinks to the bottom in liquid L2. Which statement of the following is true?   Liquids L1 and L2 have the same density.   Liquid L1 has a lower density than liquid L2.   Liquid L1 has a higher density than liquid L2.   No definite conclusion can be made about the liquid densities.   Hint Half-n-half Clue   2. The density of air is about 1 g/cm3 at room temperature and atmospheric pressure.   True   False   3. A metal body of mass 243 g occupies a volume of 90 cm3. Identify the metal.   Lead with density = 11.4 g/cm3   Iron with density = 7.9 g/cm3   Aluminum with density = 2.7 g/cm3   Tungsten with density = 19.4 g/cm3   Half-n-half Clue   4. A metal body of mass 77.6 g occupies a volume of 4 cm3. Identify the metal.   Iron with density = 7.9 g/cm3   Aluminum with density = 2.7 g/cm3   Tungsten with density = 19.4 g/cm3   Lead with density = 11.4 g/cm3   Half-n-half Clue   5. Water has the maximum density at   4oC   0oC   40oC   -4oC   Half-n-half Clue   6. Hot air is less dense than cold air.   True   False   7. Which of these has the highest density?   Water   Lead   Tungsten   Mercury   Half-n-half Clue