The entropy of an isolated system must be conserved, so it never changes. True False
The entropy of an isolated system must be conserved, so it never changes.
| True |
| False |
Homework Answers
It's False , since entropy of isolated system never decrease but tends to increase .
Hence entropy change is positive ..
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The entropy of an isolated system must be conserved, so it never changes. True False
True or false? 75. The forces in an isolated system must be conservative 76. The total...
True or false? 75. The forces in an isolated system must be conservative 76. The total mechanical energy of a system is not affected by friction forces. 77. An external force can change the total energy of a system that is not isolated. 87. The center of mass of an isolated system moves at a constant velocity as long as constant force is applied, Thank you!
True or False: If some system undergoes a reversible, isothermal process, then its entropy must remain...
True or False: If some system undergoes a reversible, isothermal process, then its entropy must remain constant.
Which of the following statements are equivalent? I. The entropy of an isolated system can never...
Which of the following statements are equivalent? I. The entropy of an isolated system can never decrease. II. Irreversible processes happen in only one direction in a closed system. III. It is impossible to construct and engine which, working in a closed cycle, shall produce no effect other than transfer of heat from a colder to a warmer body. A.I only B.III only C.I and II D.II and III E.I , II and III
15.52** (a) Suppose that the total three-momentum P = Σ p of an isolated system is conserved in a...
15.52** (a) Suppose that the total three-momentum P = Σ p of an isolated system is conserved in all inertial frames. Show that if this is true (which it is), then the fourth component P4 of the total four-momentum P = (P, P) has to be conserved as well. (b) Using the zero-component theorem of Problem 15.35, you can prove the following stronger result very quickly: If any one component of the total four-momentum P is conserved in all frames,...
True or False (Problems 1 through 10) 1. The change in entropy of a closed system...
True or False (Problems 1 through 10) 1. The change in entropy of a closed system is the same for every process between two specified states 2. The entropy of a fixed amount of an incompressible substance increases in every process for which temperature increases 3. A process that violates the second law of thermodynamics violates the first law of thermodynamics. 4. When a net amount of work is done on a closed system undergoing an internally reversible process, a...
True-False (2 points each). Circle the correct answer. 1) D F An isolated system has a...
True-False (2 points each). Circle the correct answer. 1) D F An isolated system has a net external force of zero. 2)TF Momentum is conserved in an isolated system. 3) TT The definition of work is W = Fdcos(0) 4) T (F) The spring force is proportional to the displacement of the spring end. 5) O T Engines and generators can be 100% efficient. 6) DF The impulse is equal to the change in momentum. 7) DF In an isolated...
Indicate whether each statement is true or false. (a) The entropy of the universe increases for...
Indicate whether each statement is true or false. (a) The entropy of the universe increases for any spontaneous process. (b) The entropy change of the system is equal and opposite that of the surroundings for any irreversible process. (c) The entropy of the system must increase in any spontaneous process. (d) The entropy change for an isothermal process depends on both the absolute temperature and the amount of heat reversibly transferred.
When is the momentum of a system conserved? (a) Momentum is a conserved quantity, so it’s...
When is the momentum of a system conserved? (a) Momentum is a conserved quantity, so it’s always conserved (b) Only during collisions (c) Only if the net internal force on the system is zero (d) Only if the net external force on the system is zero
Natural resources have an indefinite life so their use is never expensed. True False
Natural resources have an indefinite life so their use is never expensed. True False
The second law of thermodynamics means that ____. a) the entropy of an isolated system can...
The second law of thermodynamics means that ____. a) the entropy of an isolated system can decrease Yes/No b) the entropy of a system can decrease if the entropy of its surrounding increases by a larger amount Yes/No c) heat can spontaneously flow from a colder body to a hotter body Yes/No d) a system tends to go to a final state which has a smaller number of possible mechanical states Yes/No
15.52** (a) Suppose that the total three-momentum P = Σ p of an isolated system is conserved in all inertial frames. Show that if this is true (which it is), then the fourth component P4 of the total four-momentum P = (P, P) has to be conserved as well. (b) Using the zero-component theorem of Problem 15.35, you can prove the following stronger result very quickly: If any one component of the total four-momentum P is conserved in all frames,...
True or False (Problems 1 through 10) 1. The change in entropy of a closed system is the same for every process between two specified states 2. The entropy of a fixed amount of an incompressible substance increases in every process for which temperature increases 3. A process that violates the second law of thermodynamics violates the first law of thermodynamics. 4. When a net amount of work is done on a closed system undergoing an internally reversible process, a...
True-False (2 points each). Circle the correct answer. 1) D F An isolated system has a net external force of zero. 2)TF Momentum is conserved in an isolated system. 3) TT The definition of work is W = Fdcos(0) 4) T (F) The spring force is proportional to the displacement of the spring end. 5) O T Engines and generators can be 100% efficient. 6) DF The impulse is equal to the change in momentum. 7) DF In an isolated...
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