1. Hot air is less dense than cold air.   True   False   2. The density of water at room temperature is about   10 g/cm3   0.1 g/cm3   0.01 g/cm3   1 g/cm3   Hint Half-n-half Clue   3. One kg of air is compressed from 1 m3 to 0.5 m3. Which of the following statements is true?   The mass is doubled.   The mass is halved.   The density is halved.   The density is doubled.   Half-n-half Clue   4. The density of water is about 100 kg/m3 at room temperature.   True   False   5. Which of these has the highest density?   Water   Mercury   Tungsten   Lead   Half-n-half Clue   6. Which of these has the lowest density?   Aluminum   Glass   Water   Cork   Half-n-half Clue   7. Density is defined as   mass / volume   volume / mass   mass × volume   mass × acceleration   Half-n-half Clue   FREE PREVIEW: Last 9 Questions not a part of the free preview. Get Premium Membership to view all questions.