(a) How long will the energy in a 1470-kJ (350-kcal) cup of yogurt last in a woman doing work at the rate of 150 W with an efficiency of 20.0% (such as in leisurely climbing stairs)?(b) Does the time found in part (a) imply that it is easy to consume more food energy than you can reasonably expect to work off with exercise?

Q: Suppose a woman does 450 J of work and 9300 J of heat transfer occurs into the environment in the…

A: Workdone by the women is W = 450 J Amount of heat transfer is Q = -9300 J (As heat is going out of…

Q: Suppose a woman does 500 ) of work and 9500 J of heat transfer occurs into the environment in the…

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Q: An electrical power station requires 1.1 × 1014 J of heat transfer into the engine and has an…

A:

Q: A prototype power generation device that cycles steam between a geothermal source (temperature 393…

A: Given: The source temperature of the cycle is 393 K. The sink temperature of the cycle is 280 K.…

Q: (a) How much food energy (in kcal) will a man metabolize in the process of doing 36.7 kJ of work…

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Q: It has been proposed to use the thermal gradient of the ocean to drive a heat engine. Suppose that…

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Q: When you skid to a stop on your bike, you can significantly heat the small patch of tire that rubs…

A:

Q: As a gasoline engine is running, an amount of gasoline containing 16,000 J of chemical potential…

A: The work done by the engine, W=4000 J   The input chemical energy, Einput=16000 J

Q: A heat pump is a heating system that has an efficiency of about 150 %, that is, for every joule (J)…

A: Let us first look at the statement of Second Law of Thermodynamics, the Kelvin-Planck Statement:…

Q: A weightlifter curls a 28 kg bar, raising it each time a distance of 0.55 m.  How many times must…

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Q: A(n) 88-kg sprinter accelerates from rest to a speed of 11.0 m/s in 4.2 s. (a) Calculate the…

A: Mass(m)=88 kg Initial speed=0 m/s Final speed=11 m/s Time taken=4.2 s

Q: A heat engine exhausts 3 200 J of waste heat while performing 1 500 J of useful net work. What is…

A: Given data: Work done W=1500J Heat exhausted QC=3200J

Q: A soft drink manufacturer clains that a new diet drink is "low Joule." The label indicates the…

A:

Q: ASK YOUR TI Suppose a woman does 913 J of work and dissipates 8,254 J of heat in the process. (a)…

A: ∆U=Q-W=8254 J-913 J=7341 J2.39×10-4 kcal1 J=1.75 kcal

Q: (a) What is the best coefficient of performance for a refrigerator that cools an environment at…

A: Part (a) Given: The temperature that transfer the heat is T1=45 C. The temperature that cools the…

Q: The efficiency of a muscle during weight lifting is equal to the work done in lifting the weight…

A: efficiency of a muscle during weight lifting is equal to the work done in lifting the weight divided…

Q: As a gasoline engine is running, an amount of gasoline containing 11,100 J of chemical potential…

A: Given Data: The input energy is: Qi=11100 J The output energy is: Qo=3700 J

Q: An electrical power station uses 1.68 x 1014 J of heat input with an efficiency of 29.7%. (a) How…

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Q: he metabolic power for typing is 150 W for Lili, not a lot as you know probably. How long does it…

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Q: A freezer has a coefficient of performance of 6.30. The freezer is advertised as using 525 kW-h/y.…

A: given coefficient of performance of 6.30 It is advertised as using 525 kWh/yr

Q: Suppose a woman does 350 J of work and 9700 J of heat is transferred from her into the environment…

A: a) The change in the woman's internal energy can be found using the first law of thermodynamics: ΔU…

Q: A truck mass of m=1210kg drives up an incline at a constant speed of v = 12.7 m/s. The forces of air…

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Q: As a gasoline engine is running, an amount of gasoline containing 13,600 J of chemical potential…

A: Given: Input energy, E=13600 J Work done, W=3400 J

Q: (a) A woman climbing the Washington Monument metabolizes 6.00×102 kJ of food energy. If her…

A: Given data: Energy, E=6.00×102kJ=6×105J Efficiency, η=18%=0.18