As a result of friction between internal parts of an isolated systema, the kinehic energy of the system increases h nergy of the system remins the sameb. the total mechanical energy of the system remains the same.c. the potential energy of the system increases but the kinetic energy remains the same.system decreases.e. the total mechanical energy of the system imcreases.

Mechanical energy is the sum of kinetic and potential energy of an object.

Answered: As a result of friction between…

University Physics Volume 2

18th Edition

ISBN:9781938168161

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Chapter3: The First Law Of Thermodynamics

Section: Chapter Questions

Problem 1CQ: Consider these scenarios and state whether work is done by the system on the environment (SE) or by...

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(a) Calculate the energy in kJ used by a 55.0-kg woman who does 50 deep knee bends in which her center of mass is lowered and raised 0.400 m. (She does work in both directions.) You may assume her efficiency is 20%. (b) What is the average power consumption rate in watts if she does this in 3.00 min?
In Chapter 7, the work-kinetic energy theorem, W = K, was introduced. This equation states that work done on a system appears as a change in kinetic energy. It is a special-case equation, valid if there are no changes in any other type of energy such as potential or internal. Give two or three examples in which work is done on a system but the change in energy of the system is not a change in kinetic energy.
Shivering is an involuntary response to lowered body temperature. What is the efficiency of the body when shivering, and is this a desirable value?
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The force exerted by a diving board is conservative, provided the internal friction is negligible. Assuming friction is negligible, describe changes in the potential energy of a diving board as a swimmer dives from it, starting just before the swimmer steps on the board until just after his feet leave it.
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Consider these scenarios and state whether work is done by the system on the environment (SE) or by the environment on the system (ES): (a) opening a carbonated beverage; (b) filling a flat tire; (c) a sealed empty gas can expands on a hot day, bowing out the walls.
Work done on a system puts energy into it Work done by a system removes energy from it Give an example for each statement.
The kinetic energy of a system must always be positive or zero. Explain whether this is true for the potential energy of a system.
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