1. What does this statement define The rate of change of position in a fixed direction.   Velocity   Acceleration   Momentum   Speed   Hint Half-n-half Clue   2. Metals expand on heating and contract on cooling.   True   False   3. How much heat is required to raise the temperature of 1g of water by 1 oC.   1 Calorie   100 Joules   100 Calories   1 Joule   Half-n-half Clue   4. What is the speed of sound in air in meters per second (at a pressure of one atmosphere and temperature of 25oC)?   230   330   110   490   Half-n-half Clue   5. When a spring is released, its potential energy is converted to   Magnetic Energy   Electrical Energy   Kinetic Energy   Light Energy   Half-n-half Clue   6. The SI unit of electric current is   Farad   Ampere   Ohm   Mho    Half-n-half Clue   7. A bicycle dynamo generates Direct Current.   True   False