Suppose a woman does 450 J of work and 9300 J of heat transfer occurs into the environment in the process.   (a) What is the decrease in her internal energy (in kcal), assuming no change in temperature or consumption of food? (That is, there is no other energy transfer.)   (b) What is her efficiency (in percent)

Q: (a) Rowing your shell to work one day, you give off 4.8 * 105J of heat and do 6.2 * 105J of work.…

A: Using the first law of thermodynamics, we can write, ∆U=q+w where ∆U is the change in internal…

Q: )How long in minutes will the energy in a 904 k) (216 kcal) cup of yogurt last in a woman doing work…

A: Given: The energy is 904 kJ.             The power is 125 W.             The efficiency is 20.0%.…

Q: "A heat engine accepts 200 J of heat from a hot reservoir, does work, and releases 160 J to a cold…

A: Given  Heat taken Q1 = 200 J  Heat given to sink Q2 = 169 J

Q: Exactly 367 grams of ice are melted at a temperature of 55°C (Lịce-333 J/g ). Find the change in…

A: Solution,  Given that,  Temperature T = 55° C = 55 +273 = 328 K Heat Q= 330×367 J We know that, the…

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

A:

Q: A steam engine operates at an overall efficiency of 15%. How much heat be supplied per hour in order…

A: Heat supplied per hour P=WtP=ηQtQt=Pη

Q: (a) What is the best coefficient of performance for a heat pump that has a hot reservoir temperature…

A: (a) Given Data: The temperature of the hot reservoir is, Th=50.0 oC. The temperature of the cold…

Q: Second Law of thermodynamics. An engine in performing 196 J of work discharges 34 J of heat. What is…

A:

Q: What is the efficiency of a heat engine that uses an input heat of 6.70 x 104 J and rejects 3.28 x…

A:

Q: A reversible engine converts one sixth of heat input into work. When the temperature of the sink is…

A:

Q: A student evaluates a weight loss program by calculating the number of times she would need to climb…

A:

Q: An engine doing work isothermally takes in 10kJ and exahusts 1kJ. What is the efficiency of the…

A: Heat takes the engine,                               Heat exhausts the engine,…

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: 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: The heat that goes into a particular Carnot engine is 4.00 times greater than the work it performs.…

A: We have to find the efficiency of the carnot engine. We know the heat input in the carnot is 4 times…

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: A certain heat engine does 9.0 kJ of work and 7.50 kJ heat transfer occurs to the environment in a…

A: Given data: Work done by heat engine, W=9.0 kJ Heat transfer to the environment, QC=7.50 kJ

Q: 1. Suppose a woman does 600 J of work and -9400 J of heat transfer occurs into the environment in…

A:

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

A:

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 heat engine extracts 45.0 kJ from the hot reservoir and exhausts 40.0 kJ into the cold reservoir.…

A: The work done by heat engine: W=QH-QC Efficiency η=1-QCQH Given QC=40kJ QH=45kJ

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: The engine of a large ship does 1.97  1010 J of work with an efficiency of 8.60%. (a) How much…

A: Given : W = 1.97 x 1010 J e = 8.60% = 0.086

Q: (a) What is the best coefficient of performance for a heat pump that has a hot reservoir temperature…

A: (a). Cop = 5.07  (b).  Q = 4.36*106 (c).  0.033

Q: As a gasoline engine is running, an amount of gasoline containing 18,500 J of chemical potential…

A: (a) The engine's efficiency is η=work doneEnergy input×100%=3700 J18500 J×100%=20%

Q: An automobile engine takes in 20 000 J of heat by burning fuel and delivers 5 000 J of mechanical…

A: The efficiency of the engine is calculated by using the formula e=EoEi , where Eo= 5000 J is the…

Q: A heat pump removes 2060 J of heat from the outdoors and delivers 3060 J of heat to the inside of a…

A: Given data The heat removed by the pump is QL=2060 J The heat delivered by the house is QH=3060 J…

Q: A large electrical power station generates 1050 MW of electricity with an efficiency of 37.0%. (a)…

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts (a, b,…

Q: Suppose that a heat engine takes 3.20  104 J of heat from the high-temperature reservoir to produce…

A:

Q: As a gasoline engine is running, an amount of gasoline containing 15,000J of chemical potential…

A: Given value--- amount of gasoline containing 15,000J of chemical potential energy is burned in 1 s.…

Q: What is the ideal efficiency of an engine that runs at 3500 K when the surrounding air is 250 K?

A: The formula for the efficiency is given in terms of temperatures η=1-TcTh

Q: A diesel engine has efficiency 0.180. (a) In order for this engine to do 1.24 * 10^4 J of work, how…

A: Given data η=0.18W=1.24×104 J