1. One kg of air is compressed from 1 m3 to 0.5 m3. Which of the following statements is true?   The density is doubled.   The density is halved.   The mass is doubled.   The mass is halved.   Hint Half-n-half Clue   2. Which of the following statements is true?   Water floats on oil because water is less dense than oil.   Oil floats on water because oil is more dense than water.   Oil floats on water because oil is less dense than water.   Water floats on oil because water is more dense than oil.   Half-n-half Clue   3. Which of these has the highest density?   Lead   Water   Mercury   Tungsten   Half-n-half Clue   4. The density of water at room temperature is about   0.1 g/cm3   0.01 g/cm3   1 g/cm3   10 g/cm3   Half-n-half Clue   5. An object floats in liquid L1, but it sinks to the bottom in liquid L2. Which statement of the following is true?   No definite conclusion can be made about the liquid densities.   Liquids L1 and L2 have the same density.   Liquid L1 has a higher density than liquid L2.   Liquid L1 has a lower density than liquid L2.   Half-n-half Clue   6. Which of these has the lowest density?   Aluminum   Glass   Cork   Water   Half-n-half Clue   7. The fraction of an iceberg submerged below the water surface is   4 / 5   1 / 10   1 / 5   9 / 10   Half-n-half Clue