An Introduction to Physical Science (14th Edition)

Chapter 4

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Fossil fuels and nuclear reactions are the major ... more

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Parallel ; Work is done when the body displaces ... more

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Scalar ; Work done is , where both force and ... more

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Joule  ; Joule is the unit of work and energy, ... more

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Work  ; There is a change in energy of the objects... more

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Kinetic energy ; The sum of kinetic energy and ... more

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Square  ; Kinetic energy is proportional to the ... more

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Motion ; The energy obtained by the virtue of its ... more

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Isolated ; According to the law of conservation of... more

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Power ; Work done per unit time is power, which is... more

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0.746 ; The value of is . Divide by 1000 to ... more

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Electrical energy ; , where watt is the unit of ... more

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Coal ; Coal is observed to have more consumption ... more

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Exhausted ; Renewable sources can always be ... more

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Ethanol ; The mixture of gasoline and ethanol ... more

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work  ; Work is defined as the product of the ... more

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Yes ; Kinetic energy is proportional to the square... more

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Both the stones will have the same speed. ; At the... more

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It is possible due to the stored elastic potential... more

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All five senses can detect energy. ; Sight can be ... more

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Switch to LED bulbs. Switch off lights and fans ... more

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750 J ; The work done is equal to the the product ... more

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200 N ; The work done is the product of the force ... more

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22 J ; In order to find the work done to pull an ... more

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88 J ; In order to find the work done to lift the ... more

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; The work done is the product of the force ... more

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; The work done is the product of the force ... more

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14.7 J ; When an object drops from a height, work ... more

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11.0 J ; Work has to be done against the force of ... more

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72 km/h ; The expression for the kinetic energy of... more

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; The expression for the kinetic energy of a ... more

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The ocean has more kinetic energy than the bullet... more

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32 J ; Initially, the kinetic energy of the block ... more

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1.3 m ; Initially, the block was at rest and hence... more

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-294 JThe depth of the bottom of the well is ... more

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294 J ; The work done to lift an object against ... more

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6 m ; When the object is at a height of 12 m, it ... more

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2.0 m ; Let the potential energy be Ep and the ... more

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72 W ; First calculate work done W in moving the ... more

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12 s ; Calculate the work done W in moving the ... more

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; Convert the mass of the student from pounds to ... more

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3 c ; Convert the time for which appliance CM and ... more

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  ;  By using above equation obtained kinetic ... more

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No, for your classmate. He or she will never have ... more

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; Change in potential energy is equal to kinetic ... more

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480 ; Energy is Energy in for a month of thirty ... more

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Common ways to reduce electric bills.1) If we are ... more

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Step 1: Applied force is F=210NThe downward force ... more

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