Discuss whether or not it is possible to wholly convert a given amount of mechanical energy into thermal energy. Is it possible to wholly convert a given amount of thermal energy into mechanical energy? Cite examples to illustrate your answer.

Q: A heat engine with a thermal efficiency of 45 percent rejects 500 kJ/kg of heat. How much heat does…

A: Given:  Efficiency = 45 %  heat rejected, QC = 500 kJ/kg

Q: Are internal energy and heat energy the same? Explain.

A: An any system, particles have a certain amount of energy at certain temperature, is known as…

Q: What is the role of Phase transitions in heat flow?

A: In the heat flow, element takes heat and increase its temperature. Or element release the heat and…

Q: Why must scientists, like Sadi Carnot, worked and improved the abstract and theory of the heat…

A: Carnot engine is a theoretical thermodynamic cycle proposed by Nicolas Léonard Sadi Carnot in 1824.…

Q: Which two factors affect the amount of thermal energy an object has?

A: Two factors that affect the amount of thermal of an object are  1) The average kinetic energy of the…

Q: When is a system considered to be in thermal equilibrium? When does heat transfer from one body to…

A: Required : When is a system considered to be in thermal equilibrium.

Q: When heat transfers into a system, is the energy stored as heat? Explain briefly.

A: The heat energy is transferred from a hot body to a cool body due to their temperature difference.…

Q: When is the energy crossing the boundaries of a closed system heat and when is it work?

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Q: A locomotive travelling at a constant speed of 8.89m/s runs on a steam engine with a power…

A: speed of locomotive v = 8.89 m/s power dissipated P = 5019542.9 W efficiency  e = 0.14

Q: Is it possible for heat to flow between two objects with the same internal energy? Can heat flow…

A: yes it is possible for heat to flow between two objects with the same internal energy.

Q: How do you calculate specific heat capacity given heat flow, mass and temperature change?

A: We know, the heat flow is given by

Q: What is wrong with the following statement: “Given any two bodies, the one with the higher…

A: Heat is amount of energy that flows from a higher temperature body to the low temperature body. It…

Q: It is not possible to convert heat into mechanical work without a body at lower temperature called…

A: The engine is assumed to be back to the original thermodynamic state, after each operation cycle.…

Q: Is it possible for two objects to be in thermal equilibrium if they are not in content with each…

A: Introduction : Thermal equilibrium is basically a state of system where all objects are at the same…

Q: If you hear that an object has “high heat content,” does thatmean that its temperature is high?…

A: To determine: What does it mean, if the object has high heat content, explain whether the…

Q: Would you be willing to financially back an inventor who is marketing a device that she claims has…

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Q: Why does most of the energy expended by a swimmer ultimately converts into heat energy when she…

A: Why does most of the energy expended by a swimmer ultimately converts into heat energy when she…

Q: When thermal energy is removed from a system, what happens to the average kinetic energy of the…

A: The average kinetic energy of system is directly proportional to temperature. Temperature of an…

Q: How does the second law of thermodynamics relate to the direction of heat flow?

A: Let us understand this with an example. A hot cup of coffee is kept in open atmosphere.

Q: If a significant amount of heat were lost to the surroundings during the transfer process, would the…

A: Introduction: Specific heat capacity is defined as the amount of heat required to raise temperature…

Q: E7. How much heat must be removed fro aluminum to lower its temperature fr The specific heat…

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Q: Is there a distinction between thermal energy and internal energy?

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Q: Does adding heat to a system always increase its internal energy?

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Q: Why is thermal equilibrium always established when two objects transfer heat?

A: Heat is a form of energy that transfers from higher temperature to the lower temperature. At higher…

Q: Is it impossible to convert the heat from a single source into work without any other effect?

A: heat is converted work

Q: Name two factors on which the heat energy liberated by a body on cooling depends.

A: The heat energy liberated by the body depends on the specific heat capacity of the body, the mass of…

Q: Someone claims that the air space in a double-pane window enhances the heat transfer from a house…

A: We would disagree with this recommendation since the air space introduces some thermal resistance to…

Q: Jogging every day is good for health. Assume that when you jog a work of 500 kJ is done and 230 kJ…

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Q: How could you decrease the thermal energy of a can of soup you just took out of your pantry?

A: The temperature of a system is the measure of its thermal energy. If the temperature of the system…

Q: hich important law of physics tells us that heat production is an accurate estimate of energy…

A: initially when we doing experiment and change the chemical energy to light energy . mechanical to…

Q: What has the greatest increase in Temperature given these materials of the same mass receive the…

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Q: Why is it important to know the specific heat of materials? please explain

A: Specific heat capacity is a measure of the amount of heat energy required to change the temperature…

Q: what is the function of water bath in boomb calorimeter

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Q: Describe a situation in which heat transfer occurs?

A: Heat: It is the form of energy that takes from the hotter body to the cooler body. The flow of heat…

Q: If the person in the example is a Terminator machine that is composed of 99.99% Aluminum. How much…

A: Heat required, Q=mc∆T specific heat of aluminium 0.89J /gm-C=0.89 X1000 J/kg-C   Assume rest of the…

Q: Discuss the modern concept of heat based on internal energy.

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Q: Which law of thermodynamics tackles the role of insulators and conductors in heat flow: zeroth,…

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Q: A household refrigerator that has a power input of 450 W and a COP of 1.5 is to cool 5 large…

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Q: Assume a metal rod with an initial length Lo is heated through a temperature increase of T to a…

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