- c) Ammeter. d) Current meter. 3. What is the purpose of an electrical resistor in a circuit a) To transform the voltage in the circuit into current. b) To give electricity energy. c) To change the amount of current in the circuit. d) To convert electrical energy to other forms of energy 4. Which statement is true? a) Current and voltage are the same everywhere in a se b) Current and voltage are the same everywhere in a pa c) Current is the same series circuits and voltage is the d) Current is the same in parallel circuits and voltage is t 5. Which of the following is the correct way to write Ohm's a) R=IV b) I=RV (C) V=IR d) None of these are correct ways to write Ohm's Law. 6. Which of the following is not an example of a source in a a) Light bulb b) Cell or battery. c) Electrical outlet. d) None of the above.
- 11. One reason that could explain why dynamite releases a large quantity of energy when it explodes is that the reaction is A.endothermic, and the products have more potential energy than the reactants B. endothermic, and the reactants have more potential energy than the products C. exothermic,and the products have more potential energy than the reactants D. exothermic, and the reactants have more potential energy than the products
- What is the formula for density? m=d/v v=d/m C d=m/v dv=m
- Which is more dense solid water (ice) or liquid water? solid water (ice) liquid water
- __ 8. A car (mass=1200kg) moves at 10m/s. Calculate the mechanical kinetic energy of the car. a. 6000J b. 60000J c. 12000J d. 720000001 __ 9. If a pendulum is raised to a height of 3.0 metres above its lowest point and has 147J of gravitational potential energy, what is the mass of the pendulum? Assume that the acceleration due to gravity is 9.8m/s^2 a. 5.0 kg b. 15 kg c. 49 kg d. 98 kg __ 10. A ball (m=2kg) is thrown, giving it a mechanical kinetic energy of 64 J. Calculate the velocity of the ball. a. 4m/s b. 8m/s c. 16m/s d. 64m/s Short Answer 11. Describe one energy transformation involved when boiling water in a kettle. 12.Calculate the mechanical kinetic energy of a car (m=800kg) moving at 15m/s. Show all your work and use appropriate units.
