Describe an imaginary process that violates both the first and the second laws of thermodynamics .

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Answer 1

Textbook Question

Chapter 6.11, Problem 1P

Describe an imaginary process that violates both the first and the second laws of thermodynamics.

Expert Solution & Answer

To determine

The imaginary process that violates both thermodynamics laws of first and second.

Explanation of Solution

The 1^st law of thermodynamics explains that the amount of heat in the form of energy is transfer from one state to another state. This means heat cannot be formed or destroyed.

The 2^nd law of thermodynamics explains that total available entropy of any specified isolated system will never reduce with respect to time. The entropy will always be constant for the cases where the given system is in equilibrium or go through reversible process.

For violating the both laws; assume that a system producing 7 kWh of electricity where 6 kWh of heat is transferring to an electric resistance wire.

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5. The figure shows a gear train. There is no friction at the bearings except for the gear tooth forces. The material of the milled gears is steel having a Brinell hardness of 170. The input shaft speed (n2) is 800 rpm. The face width and the contact angle for all gears are 1 in and 20° respectively. In this gear set, the endurance limit (Se) is 15 kpsi and nd (design factor) is 2. (a) Find the revolution speed of gear 5. (b) Determine whether each gear satisfies the design factor of 2.0 for bending fatigue. (c) Determine whether each gear satisfies the design factor of 2.0 for surface fatigue (contact stress). (d) According to the computation results of the questions (b) and (c), explain the possible failure mechanisms for each gear. N4=28 800rpm N₁=43 N5=34 N₂=14 P(diameteral pitch)=8 for all gears Coupled to 2.5hp motor

1. The rotating steel shaft is simply supported by bearings at points of B and C, and is driven by a spur gear at D, which has a 6-in pitch diameter. The force F from the drive gear acts at a pressure angle of 20°. The shaft transmits a torque to point A of TA =3000 lbĘ in. The shaft is machined from steel with Sy=60kpsi and Sut=80 kpsi. (1) Draw a shear force diagram and a bending moment diagram by F. According to your analysis, where is the point of interest to evaluate the safety factor among A, B, C, and D? Describe the reason. (Hint: To find F, the torque Tд is generated by the tangential force of F (i.e. Ftangential-Fcos20°) When n=2.5, K=1.8, and K₁ =1.3, determine the diameter of the shaft based on (2) static analysis using DE theory (note that fatigue stress concentration factors need to be used for this question because the loading condition is fatigue) and (3) a fatigue analysis using modified Goodman. Note) A standard diameter is not required for the questions. 10 in D

Answer 2

Textbook Question

Chapter 6.11, Problem 1P

Describe an imaginary process that violates both the first and the second laws of thermodynamics.

Expert Solution & Answer

To determine

The imaginary process that violates both thermodynamics laws of first and second.

Explanation of Solution

The 1^st law of thermodynamics explains that the amount of heat in the form of energy is transfer from one state to another state. This means heat cannot be formed or destroyed.

The 2^nd law of thermodynamics explains that total available entropy of any specified isolated system will never reduce with respect to time. The entropy will always be constant for the cases where the given system is in equilibrium or go through reversible process.

For violating the both laws; assume that a system producing 7 kWh of electricity where 6 kWh of heat is transferring to an electric resistance wire.

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Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 3

Textbook Question

Chapter 6.11, Problem 1P

Describe an imaginary process that violates both the first and the second laws of thermodynamics.

Expert Solution & Answer

To determine

The imaginary process that violates both thermodynamics laws of first and second.

Explanation of Solution

The 1^st law of thermodynamics explains that the amount of heat in the form of energy is transfer from one state to another state. This means heat cannot be formed or destroyed.

The 2^nd law of thermodynamics explains that total available entropy of any specified isolated system will never reduce with respect to time. The entropy will always be constant for the cases where the given system is in equilibrium or go through reversible process.

For violating the both laws; assume that a system producing 7 kWh of electricity where 6 kWh of heat is transferring to an electric resistance wire.

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Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 4

Textbook Question

Chapter 6.11, Problem 1P

Describe an imaginary process that violates both the first and the second laws of thermodynamics.

Expert Solution & Answer

To determine

The imaginary process that violates both thermodynamics laws of first and second.

Explanation of Solution

The 1^st law of thermodynamics explains that the amount of heat in the form of energy is transfer from one state to another state. This means heat cannot be formed or destroyed.

The 2^nd law of thermodynamics explains that total available entropy of any specified isolated system will never reduce with respect to time. The entropy will always be constant for the cases where the given system is in equilibrium or go through reversible process.

For violating the both laws; assume that a system producing 7 kWh of electricity where 6 kWh of heat is transferring to an electric resistance wire.

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Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 5

Textbook Question

Answer 6

Textbook Question

Answer 7

Expert Solution & Answer

To determine

The imaginary process that violates both thermodynamics laws of first and second.

Explanation of Solution

The 1^st law of thermodynamics explains that the amount of heat in the form of energy is transfer from one state to another state. This means heat cannot be formed or destroyed.

The 2^nd law of thermodynamics explains that total available entropy of any specified isolated system will never reduce with respect to time. The entropy will always be constant for the cases where the given system is in equilibrium or go through reversible process.

For violating the both laws; assume that a system producing 7 kWh of electricity where 6 kWh of heat is transferring to an electric resistance wire.

Answer 8

Expert Solution & Answer

To determine

The imaginary process that violates both thermodynamics laws of first and second.

Explanation of Solution

The 1^st law of thermodynamics explains that the amount of heat in the form of energy is transfer from one state to another state. This means heat cannot be formed or destroyed.

The 2^nd law of thermodynamics explains that total available entropy of any specified isolated system will never reduce with respect to time. The entropy will always be constant for the cases where the given system is in equilibrium or go through reversible process.

For violating the both laws; assume that a system producing 7 kWh of electricity where 6 kWh of heat is transferring to an electric resistance wire.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

To determine

The imaginary process that violates both thermodynamics laws of first and second.

Answer 12

Explanation of Solution

The 1^st law of thermodynamics explains that the amount of heat in the form of energy is transfer from one state to another state. This means heat cannot be formed or destroyed.

The 2^nd law of thermodynamics explains that total available entropy of any specified isolated system will never reduce with respect to time. The entropy will always be constant for the cases where the given system is in equilibrium or go through reversible process.

For violating the both laws; assume that a system producing 7 kWh of electricity where 6 kWh of heat is transferring to an electric resistance wire.

Answer 13

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Describe an imaginary process that violates both the first and the second laws of thermodynamics .

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