Physical Universe
16th Edition
ISBN: 9780077862619
Author: KRAUSKOPF, Konrad B. (konrad Bates), Beiser, Arthur
Publisher: Mcgraw-hill Education,
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Chapter 5, Problem 25MC
To determine
The exhaust temperature for which the efficiency of a frictionless
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Chapter 5 Solutions
Physical Universe
Ch. 5 - Prob. 1MCCh. 5 - One gram of steam at 100C causes a more serious...Ch. 5 - Prob. 3MCCh. 5 - Heat transfer in a vacuum can occur by a....Ch. 5 - The fluid at the bottom of a container is a. under...Ch. 5 - The pressure of the earths atmosphere at sea level...Ch. 5 - Prob. 7MCCh. 5 - The density of freshwater is 1.00 g/cm3 and that...Ch. 5 - Prob. 9MCCh. 5 - Prob. 10MC
Ch. 5 - Prob. 11MCCh. 5 - Prob. 12MCCh. 5 - Prob. 13MCCh. 5 - Absolute zero may be regarded as that temperature...Ch. 5 - Prob. 15MCCh. 5 - Prob. 16MCCh. 5 - Prob. 17MCCh. 5 - Prob. 18MCCh. 5 - Prob. 19MCCh. 5 - When a vapor condenses into a liquid, a. its...Ch. 5 - Prob. 21MCCh. 5 - Prob. 22MCCh. 5 - Prob. 23MCCh. 5 - Prob. 24MCCh. 5 - Prob. 25MCCh. 5 - The physics of a refrigerator most closely...Ch. 5 - Prob. 27MCCh. 5 - Prob. 28MCCh. 5 - Prob. 29MCCh. 5 - The second law of thermodynamics does not lead to...Ch. 5 - Prob. 31MCCh. 5 - Prob. 32MCCh. 5 - Prob. 33MCCh. 5 - Prob. 34MCCh. 5 - Prob. 35MCCh. 5 - Prob. 36MCCh. 5 - Prob. 37MCCh. 5 - Prob. 38MCCh. 5 - Prob. 39MCCh. 5 - A wooden plank 200 cm long, 30 cm wide, and 40 mm...Ch. 5 - Prob. 41MCCh. 5 - Prob. 42MCCh. 5 - Prob. 43MCCh. 5 - Prob. 44MCCh. 5 - Prob. 45MCCh. 5 - Running hot water over the metal lid of a glass...Ch. 5 - When a mercury-in-glass thermometer is heated, its...Ch. 5 - Three iron bars are heated in a furnace to...Ch. 5 - Why do you think the Celsius temperature scale is...Ch. 5 - Normal room temperature is about 20C. What is this...Ch. 5 - What is the Celsius equivalent of a temperature of...Ch. 5 - Prob. 7ECh. 5 - You have a Fahrenheit thermometer in your left...Ch. 5 - Why is a piece of ice at 0C more effective in...Ch. 5 - Would it be more efficient to warm your bed on a...Ch. 5 - A cup of hot coffee can be cooled by placing a...Ch. 5 - A 150-L water heater is rated at 8 kW. If 20...Ch. 5 - Prob. 13ECh. 5 - Prob. 14ECh. 5 - Prob. 15ECh. 5 - Prob. 16ECh. 5 - Prob. 17ECh. 5 - An essential part of a home solar heating system...Ch. 5 - A 10-kg stone is dropped into a pool of water from...Ch. 5 - Why do tables of densities always include the...Ch. 5 - A room is 5 m long, 4 m wide, and 3 m high. What...Ch. 5 - A 156-kg coil of sheet steel is 0.80 mm thick and...Ch. 5 - A 50-g bracelet is suspected of being gold-plated...Ch. 5 - Prob. 24ECh. 5 - Mammals have approximately the same density as...Ch. 5 - Prob. 26ECh. 5 - Prob. 27ECh. 5 - Some water is boiled briefly in an open metal can....Ch. 5 - When a person drinks a soda through a straw, where...Ch. 5 - Prob. 30ECh. 5 - The three containers shown in Fig. 5-55 are filled...Ch. 5 - A 60-kg swami lies on a bed of nails with his body...Ch. 5 - A tire pump has a piston whose cross-sectional...Ch. 5 - Prob. 34ECh. 5 - A 1200-lb car is equally supported by its four...Ch. 5 - The smallest bone in the index finger of a 75-kg...Ch. 5 - A hypodermic syringe whose cylinder has a...Ch. 5 - Prob. 38ECh. 5 - Why does buoyancy occur? Under what circumstances...Ch. 5 - Two balls of the same size but of different mass...Ch. 5 - A wooden block is submerged in a tank of water and...Ch. 5 - Prob. 42ECh. 5 - Prob. 43ECh. 5 - Prob. 44ECh. 5 - Prob. 45ECh. 5 - Prob. 46ECh. 5 - Prob. 47ECh. 5 - Prob. 48ECh. 5 - Prob. 49ECh. 5 - Prob. 50ECh. 5 - Prob. 51ECh. 5 - Prob. 52ECh. 5 - A 200-L iron tank has a mass of 36 kg. (a) Will it...Ch. 5 - What are the equivalents of 0 K, 0C, and 0F in the...Ch. 5 - A certain quantity of hydrogen occupies a volume...Ch. 5 - A tire contains air at a pressure of 2.8 bar at...Ch. 5 - Prob. 57ECh. 5 - A weather balloon carries instruments that measure...Ch. 5 - To what Celsius temperature must a gas sample...Ch. 5 - Prob. 60ECh. 5 - Prob. 61ECh. 5 - Prob. 62ECh. 5 - Is it meaningful to say that an object at a...Ch. 5 - Prob. 64ECh. 5 - Prob. 65ECh. 5 - The pressure on a sample of hydrogen is doubled,...Ch. 5 - Prob. 67ECh. 5 - Prob. 68ECh. 5 - Prob. 69ECh. 5 - Prob. 70ECh. 5 - To what temperature must a gas sample initially at...Ch. 5 - Prob. 72ECh. 5 - Prob. 73ECh. 5 - You can safely put your hand inside a hot oven for...Ch. 5 - Prob. 75ECh. 5 - Prob. 76ECh. 5 - What is the advantage of installing the heating...Ch. 5 - Why does evaporation cool a liquid?Ch. 5 - Prob. 79ECh. 5 - Prob. 80ECh. 5 - Give as many methods as you can think of that will...Ch. 5 - How much heat is given off when 1 kg of steam at...Ch. 5 - Prob. 83ECh. 5 - Prob. 84ECh. 5 - Prob. 85ECh. 5 - Prob. 86ECh. 5 - Water at 50C can be obtained by mixing together...Ch. 5 - Prob. 88ECh. 5 - Prob. 89ECh. 5 - Prob. 90ECh. 5 - Prob. 91ECh. 5 - Is it correct to say that a refrigerator produces...Ch. 5 - Prob. 93ECh. 5 - Prob. 94ECh. 5 - An engine that operates between 2000 K and 700 K...Ch. 5 - Prob. 96ECh. 5 - Prob. 97ECh. 5 - Prob. 98ECh. 5 - Prob. 99ECh. 5 - Prob. 100E
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- (a) How much heat transfer occurs from 20.0 kg of 90.0C water placed in contact with 20.0 kg of 10.0C water, producing a final temperature of 50.0C ? (b) How much work could a Carnot engine do with this heat transfer, assuming it operates between two reservoirs at constant temperatures of 90.0C and 10.0C ? (c) What increase in entropy is produced by mixing 20.0 kg of 90.0C water with 20.0 kg of 10.0C water? (d) Calculate the amount of work made unavailable by this mixing using a low temperature of 10.0C, and compare it with the work done by the Garnet engine. Explicitly show how you follow the steps in the Problem-Solving Strategies for Entropy. (e) Discuss how everyday processes make increasingly more energy unavailable to do work, as implied by this problem.arrow_forwardSuppose an ideal (Carnot) heat pump could be constructed for use as an air conditioner. (a) Obtain an expression for the coefficient of performance (COP) for such an air conditioner in terms of Tb and Tc. (b) Would such an air conditioner operate on a smaller energy input if the difference in the operating temperatures were greater or smaller? (c) Compute the COP for such an air conditioner if the indoor temperature is 20.0C and the outdoor temperature is 40.0C.arrow_forwardA system does 1.80108J of work while 7.50108J of heat transfer occurs to the environment. What is the change in internal energy of the system assuming no other changes (such as in temperature or by the addition of fuel)?arrow_forward
- (a) What is the best coefficient of performance for a heat pump that has a hot reservoir temperature of 50.0C and a cold reservoir temperature of 20.0C ? (b) How much heat transfer occurs into the warm environment if 3.60107J of work (10.0kWh) is put into it? (c) If the cost of this work input is 10.0cent/kWh, haw does its cost compare with the direct heat transfer achieved by burning natural gas at a cost of 85.0 cents per therm. (A therm is a common unit of energy for natural gas and equals 1.055108J .)arrow_forward(a) What is the eficiency of a cyclical heat engine in which 75.0 kJ of heat transfer occurs to the environment for every 95.0 kJ of heat transfer into the engine? (b) How much work does it produce for 100 kJ of heat transfer into the engine?arrow_forwardA biology laboratory is maintained at a constant temperature of 7.00C by an air conditioner, which is vented to the air outside. On a typical hot summer day, the outside temperature is 27.0C and the air-conditioning unit emits energy to the outside at a rate of 10.0 kW. Model the unit as having a coefficient of performance (COP) equal to 40.0% of the COP of an ideal Carnot device. (a) At what rate does the air conditioner remove energy from the laboratory? (b) Calculate the power required for the work input. (c) Find the change in entropy of the Universe produced by the air conditioner in 1.00 h. (d) What If? The outside temperature increases to 32.0C. Find the fractional change in the COP of the air conditioner.arrow_forward
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