1. Water at 25oC is mixed with an equal mass of water at 55oC. If there are no heat losses to the surroundings, then what is the final temperature of the water mixture ?   80.0oC   25oC   40.0oC   55oC   Hint Half-n-half Clue   2. Heat is a form of _______.   expansion   electricity   energy   Half-n-half Clue   3. _______ requires no medium.   Radiation   Convection   Conduction   Half-n-half Clue   4. The SI unit of heat (thermal energy) is   Watt   Joule   Newton   Pascal   Half-n-half Clue   5. 1 Joule = _______ ergs   105   4.184   107   4.214   Half-n-half Clue   6. The calorific value of a fuel is the quantity of heat produced when a unit _______ of it is burnt.   mass   weight   volume   Half-n-half Clue   7. Liquids exhibit only _______ expansion.   cubical   linear   superficial   Half-n-half Clue