#### Which of the following statements best describes a conservation law in physics? 1. [x] Conservation laws state that energy can neither be created nor destroyed, only transformed from one form to another. 2. [ ] Conservation laws state that energy within a closed system decreases over time. 3. [ ] Conservation laws state that energy can be created within a closed system. 4. [ ] Conservation laws only apply to mechanical systems. #### Which of the following statements best describes the first law of conservation of energy? 1. [x] Energy cannot be created or destroyed, only transformed from one form to another. 2. [ ] The total energy of an isolated system remains constant over time. 3. [ ] Energy can be created within a closed system. 4. [ ] The total energy of a system decreases over time. #### Which of the following statements best describes the second law of conservation of energy? 1. [ ] Energy cannot be created or destroyed, only transformed from one form to another. 2. [ ] The total energy of an isolated system remains constant over time. 3. [ ] Energy can be created within a closed system. 4. [x] The total entropy of an isolated system tends to increase over time. #### Which of the following best describes the conservation of angular momentum? 1. [x] Angular momentum is conserved when the net external torque acting on a system is zero. 2. [ ] Angular momentum is conserved only in linear motion. 3. [ ] Angular momentum is conserved when the net external force acting on a system is zero. 4. [ ] Angular momentum is conserved only in the absence of friction. #### Matter cannot be created nor destroyed. It can only be 1. [ ] Destroyed a little bit. 2. [ ] Invisible 3. [x] Transformed 4. [ ] None of the Above