II. MULTIPLE CHOICE. Choose the letter of your answer that best describe the given question.
8.
is the first Law of Thermodynamics.
A. Conservation of Mass
C. Conservation of Pressure
D. Conservation of Momentum
B. Conservation of Energy
9. Below are statements about the conservation of energy in a closed system, which of the following is INCORRECT?
A. The total energy of a closed system is constant.
B. Energy in closed system can neither increase nor decrease without interference from outside.
C. The total energy in a closed system must remain inconstant.
D. Energy within a closed system may be transformed between different types but the total energy should remain
unchanged.
10. The following are samples of a spontaneous process, EXCEPT.
A. ball rolling down an incline
C. Diffusion of gas from low pressure to high pressure
D. iron rusting
B. water flowing downhill
11. The energy stored in a stretched elastic material such as spring.
A. elastic potential energy
C. kinetic energy
B. gravitational potential energy
D. mechanical energy
12. The following are samples of a non-spontaneous process, EXCEPT.
A. melting of ice
C. Diffusion of gas from low pressure to high pressure
D. boiling of water
B. flow of heat
13. It is known as a motion energy which explains how an object moves based on its position and motion.
A. potential energy
B. kinetic energy
C. mechanical energy
D. chemical energy
14. It is the standard unit used to measure energy.
A. ampere
B. watt
C. volt
D. joule
15. Which event best illustrate the direct transformation of potential energy to kinetic energy?
A. A car moves from rest.
C. A volleyball player catches the ball
B. A rock sitting on the edge of a cliff.
D. None of the these is the correct answer.​