Multiple Choice
What is the maximum possible coefficient of performance for a refrigerator operating between 2.0°C (a typical refrigerator temperature) and 20°C (a typical kitchen temperature)?
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Table of contents
- 0. Math Review
- 1. Intro to Physics Units
- 2. 1D Motion / Kinematics
- Vectors, Scalars, & Displacement
- Average Velocity
- Intro to Acceleration
- Position-Time Graphs & Velocity
- Conceptual Problems with Position-Time Graphs
- Velocity-Time Graphs & Acceleration
- Calculating Displacement from Velocity-Time Graphs
- Conceptual Problems with Velocity-Time Graphs
- Calculating Change in Velocity from Acceleration-Time Graphs
- Graphing Position, Velocity, and Acceleration Graphs
- Velocity Functions with Calculus
- Acceleration Functions with Calculus
- Kinematics Equations
- Vertical Motion and Free Fall
- Catch/Overtake Problems
- 3. Vectors
- Review of Vectors vs. Scalars
- Introduction to Vectors
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- Vector Composition & Decomposition
- Adding Vectors by Components
- Trig Review
- Unit Vectors
- Introduction to Dot Product (Scalar Product)
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- Intro to Cross Product (Vector Product)
- Calculating Cross Product Using Components
- 4. 2D Kinematics
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- Uniform Circular Motion
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- 11. Momentum & Impulse
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- More Conservation of Energy Problems
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- Rotational Dynamics with Two Motions
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- 14. Torque & Rotational Dynamics
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- Opening/Closing Arms on Rotating Stool
- Conservation of Angular Momentum
- Angular Momentum & Newton's Second Law
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- Latent Heat & Phase Changes
- Intro to Calorimetry
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- Advanced Calorimetry: Equilibrium Temperature with Phase Changes
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- Heat Transfer
- 21. Kinetic Theory of Ideal Gases
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- Electric Charge
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- 35. Special Relativity
23. The Second Law of Thermodynamics
Refrigerators
Back23. The Second Law of Thermodynamics
Refrigerators
- Multiple Choice
In the context of refrigerators, what does the coefficient of performance () represent?
99views - Multiple Choice
Which of the following components is primarily responsible for cooling the air inside a household refrigerator?
76views - Multiple Choice
Which of the following best describes the function of a commercial refrigerator that uses as the working fluid?
82views - Multiple ChoiceFreezing a kilogram of water, initially at 20°C, requires your refrigerator to remove about of thermal energy from the water. If the coefficient of performance of your refrigerator is 5.0, how much heat is exhausted into your kitchen when you freeze a kilogram of water?2121views
- Multiple Choice
A refrigerator has a coefficient of performance of 2.4. Each cycle, it takes in 3×104 J of heat from the cold reservoir. How much is expelled to the hot reservoir?
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