Directions: Answer all the following questions below (1-15), put a detailed explanation per number, I will rate it helpful. Thank you very much.

1. It is the energy possessed by an object by virtue of motion. a. kinetic energy I). potential energy c. elastic energy d. gravitational energy 2. Which law states that energy can neither be created nor destroyed. a. Law of Inertia c. Third Law of Motion o. Law of Conservation of Mechanical Energy d. Law of Conservation of Momentum 3. which among the (arms or energy is considered a potential energy? a. Heat energy b. sound energy c. elastic energy d. light energy 4. Mechanical energy is not conserved when a. gravitational potential energy is converted to kinetic energy. o. kinetic energy is convened to gravitational potential energy. c. kinetic energy is converted to elastic potential energy. a. friction is not negligible. 5. which of the following happens to the energy of the pendulum as it moves to point c from point A? a. loses potential energy and gains kinetic energy b. Loses both potential and kinetic energy c. Gains potential energy and loses kinetic energy a. Gains both kinetic and potential energy 6. The total mechanical energy of an object is equal to a. the sum of kinetic energy and gravitational potential energy. b. the sum of kinetic energy and elastic potential energy. c. the sum of kinetic energy and all relevant forms of potential energy. d. the sum of all forms of energy 7. Which event does NOT describe potential energy being changed into kinetic energy? a. a ball rolls down the hill c. a twig falls from a branch b. a spring being compressed d. a stretch rubber band is released 8. What happens to the potential energy of the ball thrown upward? a. increases b. decreases c. equal d. cannot be determined 9. First Law of Thermodynamics deals with a. Conservation of Mass c. Conservation of Momentum b. Conservation of Energy d. Conservation of Pressure 10. Which of the following processes wherein heat flows from higher temperature to lower temperature and it does not require any external energy to occur? a. non-spontaneous process c. spontaneous process b. thermodynamic process d. adiabatic process 11. All the following are example of non - spontaneous process EXCEPT a. Keeping the food fresh from spoilage c. Melting of ice b. Going up the hill d. Breakage of egg 12. A ball rolling down the hill is an example of a. spontaneous process c. adiabatic process b. non-spontaneous process d. thermodynamic process12. A ball rolling down the hill is an example of a. spontaneous process c. adiabatic process b. non-spontaneous process d. thermodynamic process 13. A 120 Joules of energy is added to a system that does 40 Joules of external work. By how much is the thermal energy of the system? a. 120 Joules b. 40 Joules c. 80 Joules d. 160 Joules 14. While a gas does 200 Joules of work on its surrounding, 500 Joules of heat is added to the gas. What is the change in the internal energy of the gas? a. 200 Joules b. 300 Joules c. 400 Joules d. 500 Joules 15. Normally, heat flows from a hotter object to temperature to cooler object when the two objects are placed in contact. But the reverse can be done with the use of a. engine b. heat pump c. compressor d. condenser