1. The heat produced on burning 7 kg of fuel oil which has a calorific value of 39800 kJ/kg is   5685.7 MJ   278.6 MJ   278600 MJ   5.7 MJ   Hint Half-n-half Clue   2. Water at 25oC is mixed with an equal mass of water at 70oC. If there are no heat losses to the surroundings, then what is the final temperature of the water mixture ?   47.5oC   25oC   70oC   95.0oC   Half-n-half Clue   3. 1 Joule = _______ ergs   107   105   4.184   4.214   Half-n-half Clue   4. Heat energy travels through _______ by conduction only.   gases   solids   liquids   Half-n-half Clue   5. Liquids exhibit only _______ expansion.   linear   superficial   cubical   Half-n-half Clue   6. _______ requires no medium.   Convection   Conduction   Radiation   Half-n-half Clue   7. Given that 1 cal (about 4.2 J) of heat is lost by 1 g of water in cooling by 1oC, how much heat is lost by 5 g of water in cooling from 70oC to 10oC ?   1260.0 J   252.0 J   21.0 J   300.0 J   Half-n-half Clue