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The energy used to power a vehicle can be measured in:
A. Joules
B. Watts
C. Amperes
D. Volts
Answer: Joules
The kinetic energy of an object is directly proportional to its:
A. Mass and the square of its velocity
B. Mass and its velocity
C. Velocity and its height
D. Mass and the square of its height
Answer: Mass and the square of its velocity
Which of the following is an example of energy conversion?
A. Turning on a light bulb
B. Boiling water
C. Charging a battery
D. All of the above
Answer: All of the above
The power rating of an appliance is a measure of its:
A. Energy consumption per unit time
B. Energy stored
C. Efficiency
D. Force applied
Answer: Energy consumption per unit time
The potential energy of an object at a height of 5 meters with a mass of 2 kg is:
A. 100 J
B. 10 J
C. 20 J
D. 50 J
Answer: 100 J
In a conservation of energy process, energy is:
A. Transferred
B. Destroyed
C. Created
D. None of the above
Answer: Transferred
The total energy of an isolated system is:
A. Always conserved
B. Always increasing
C. Always decreasing
D. Depends on external forces
Answer: Always conserved
The energy possessed by a body due to its motion is called:
A. Kinetic energy
B. Potential energy
C. Mechanical energy
D. Chemical energy
Answer: Kinetic energy
If the power of an engine is 1000 W and it operates for 10 seconds, the total work done is:
A. 10,000 J
B. 100 J
C. 1000 J
D. 10 J
Answer: 10,000 J