You decide to use your body as a Carnot heat engine. The operating gas is in a tube with one end in your mouth (where the temperature is 37.0 ∘C) and the other end at the surface of your skin, at 30.0 ∘C. What is the maximum efficiency of such a heat engine? e = 2.3 % Suppose you want to use this human engine to lift a 3.50 kg box from the floor to a tabletop 1.20 m above the floor. How much must you increase the gravitational potential energy? U = 41.2 J How much heat input is needed to accomplish the lift?    How many 350 calorie (those are food calories, remember) candy bars must you eat to lift the box in this way? Recall that 80% of the food energy goes into heat. Express your answer using two significant figures.

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Q: One mole of an ideal gas first undergoes an isothermal expansion at a tempreture T1 = 600 K to 2…

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Q: 9. A heat engine does 2000 J of work and it loses 6000 J through the exhaust and friction. What is…

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A: .

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Q: The heat engine shown in the figure uses 2.0 mol of a monatomic gas as the working substance.…

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A: Given: A closed system containing gas is fitted with a movable piston. The introduction of 430 J of…

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Q: Suppose a heat engine is connected to two energy reservoirs, one a pool of molten aluminum (660°C)…

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Q: A cyclic thermodynamics process for an ideal gas has gone through four steps. The amount of heat…

A: given: Q1=5960 JQ2 = -5600 JQ3 = -3000 JQ4 = -4870 J∆U1 = 3670 J∆U2 = -4800 J∆U3 = -1800 J

Q: BMR Basal Metabolic Rate is the rate of heat energy generation when a person is at rest. Some diet…

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Q: A cylinder with a movable piston encloses 0.25 mole of ideal gas at 300 K. How much heat is required…

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Q: A how strong stove do we need to heat a house whose exterior walls have a surface of 350 m^2 , if we…

A: SOlution: given that A = 350 m2 dT = 22°C - (-8°C) =30 °C x1 = 30 cm x2 = 5 cm

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Q: The air inside a garage is to be heated using a heat pump driven by a 545.00 W545.00 W electric…

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Q: P (Pa) A B 900 600 300 P.

A: For monoatomic gas Cp = (5/3)R  Cv = (3/2) Cv   Area under PV graph represents work done.

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Q: 2.0 moles of a monatomic ideal gas undergoes an isobaric process in which the temperature changes…

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Q: An air-filled cylinder with a movable piston has a heat reservoir in con- tact with it. The heat…

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Q: One mole of an ideal gas first undergoes an isothermal expansion at a temperature T₁ = 700 K to 2…

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Q: 5.00 moles of Argon, a monatomic ideal gas, occupies a volume of 15.0 L at a pressure equal to 1.4 x…

A: Given that; Pressure (p)= 1.4 x 105 Pa  Volume (v) = 15L Number of mole = 5

Q: The pressure of an ideal gas can be expressed by P = AV ³ + BV² + C Where A = 3.00 x 105 Pa /mº and…

A: Solution:-Given thatP=AV3+BV2+CA=3×105 Pa/m9, B=5×105 Pa/m6 and C=105 PaV1=2 m3V2=3.6 m3Q=20 MJ

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Q: A lab rat lifts a 200 g mass 1.55 m high as it spins on a Ferris wheel. At the same time, it loses…

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Q: A stationary mass of gas was compressed (without friction) at constant pressure. Its state was…

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Q: 2.0 moles of a monatomic ideal gas undergoes an isobaric process in which the temperature changes…

A: Number of  moles of gas n = 2.0 Initial temperature Ti = 260 K Final temperature Tf = 320 K

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Q: Imagine a physics lecture hall with 83 students who are settling in for a 1-hour lecture. At the…

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Q: 10. An engine has a hot reservoir that contains 20,000 J of heat energy at 327° C, and a cold…

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Q: 1 For four situations for an ideal gas, the table gives the energy transferred to or from the gas as…

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Q: A certain gas is compressed adiabatically. The amount of work done on the gas is 800 J. What is the…

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Q: 8.4 A cylinder is equipped with a tight-fitting but easily movable piston. The cylinder contains…

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Q: Two engines operate between the same two temperatures of 787 K and 385 K, and have the same rate of…

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Q: ONe mole of an ideal gas first undergoes an isothermal expansion at a tempreture Ti = 500 K to 2…

A: Given, One mole of an ideal gas undergoes isothermal expansion at the temperature Ti=500K Then it…