In Science / Junior High School | 2025-03-15

8. When the work is done upon the object, that object gains energy. What type of energy is acquired by the objects upon which work is done? a. Electrical energy b. Heat energy c. Mechanical energy d. Work energy 9. Which refers to the sum of kinetic and potential energies of its particles and their interactions? a. Mechanical energy b. Internal energy c. External energy d. Heat energy 10. A system's internal energy can be changed by transferring energy by either work, heat, or a combination of the two. What Law explains the system? a. Law of heat b. First law of thermodynamics c. Second law of thermodynamics d. Internal energy law 11. How does heat and work affect a system? a. heat and work both contribute to the total internal energy of a system b. heat and work do not affect to the total internal energy of a system c. without heat and work, there will be no internal energy of the system d. heat and work affects the system in a negligible impact 12. Which of the following is NOT correct? a. Heat and work are related. b. Work is measured in joules. c. Heat cannot be completely converted into work. d. Heat is a form of energy. 13. Which of the following is an example of work converted into heat? a. Heat engine b. Hand rubbing c. Gas stove d. Hot air balloon 14. What happens to the molecules in the balloons when heated? a. molecules collide into the balloon with more energy b. molecules freeze into the balloon with less energy c. molecules collide into the balloon with less energy d. molecules freeze into the balloon with no energy 15. What is the net change in internal energy (AU) if the amount of work done (W) is the same as the amount of energy transferred in by heat (Q)? a. The net internal energy is zero. b. The net internal energy is 1. c. The net internal energy is 100. d. The net internal energy cannot be determined.​

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