An Introduction to Physical Science
14th Edition
ISBN: 9781305079120
Author: James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres
Publisher: Brooks Cole
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Chapter 5, Problem 12E
To determine
Calculate the distance walked by a person to burn off
1 lb
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A pronghorn antelope can run at a remarkable 18 m/sm/s for up to 10 minutes, almost triple the speed that an elite human runner can maintain. For a 32 kgkg pronghorn, this requires an astonishing 3.4 kWkW of metabolic power, which leads to a significant increase in body temperature.
If the pronghorn had no way to exhaust heat to the environment, by how much would its body temperature increase during this run? (In fact, it will lose some heat, so the rise won't be this dramatic, but it will be quite noticeable, requiring adaptations that keep the pronghorn's brain cooler than its body in such circumstances.) Assume the efficiency of the pronghorn to be equal to that of human.
Sweating is one of the main mechanisms with which the body dissipates heat. Sweat evaporates with a latent heat of 2 430 kJ/kg at body temperature, and the body can produce as much as 1.5 kg of sweat per hour. If sweating were the only heat dissipation mechanism, what would be the maximum sustainable metabolic rate, in watts, if 80% of the energy used by the body goes into waste heat?
A 68 kg cyclist is pedaling down the road at 15 km/h, using a total metabolic power of 480 W. A certain fraction of this energy is used to move the bicycle forward, but the balance ends up as thermal energy in his body, which he must get rid of to keep cool. On a very warm day, conduction, convection, and radiation transfer little energy, and so he does this by perspiring, with the evaporation of water taking away the excess thermal energy.
To keep from overheating, the cyclist must get rid of the excess thermal energy generated in his body. If he cycles at this rate for 2 hours, how many liters of water must he perspire, to the nearest 0.1 liter?A. 0.4 L B. 0.9 L C. 1.1 L D. 1.4 L
Chapter 5 Solutions
An Introduction to Physical Science
Ch. 5.1 - We talk about temperature, but what does it...Ch. 5.1 - Are there any limits on the lowest and highest...Ch. 5.1 - Show that a temperature of 40 is the same on both...Ch. 5.2 - Prob. 1PQCh. 5.2 - Most substances contract with decreasing...Ch. 5.3 - What is specific about specific heat?Ch. 5.3 - Prob. 2PQCh. 5.3 - Prob. 5.2CECh. 5.3 - How much heat must be removed from 0.20 kg of...Ch. 5.4 - What are the three methods of heat transfer?
Ch. 5.4 - Prob. 2PQCh. 5.5 - Prob. 1PQCh. 5.5 - Prob. 2PQCh. 5.6 - In the ideal gas law, pressure is directly...Ch. 5.6 - Prob. 2PQCh. 5.6 - Prob. 5.4CECh. 5.7 - Prob. 1PQCh. 5.7 - Prob. 2PQCh. 5 - Prob. AMCh. 5 - Prob. BMCh. 5 - Prob. CMCh. 5 - Prob. DMCh. 5 - Prob. EMCh. 5 - Prob. FMCh. 5 - Prob. GMCh. 5 - Prob. HMCh. 5 - Prob. IMCh. 5 - Prob. JMCh. 5 - Prob. KMCh. 5 - Prob. LMCh. 5 - Prob. MMCh. 5 - Prob. NMCh. 5 - Prob. OMCh. 5 - Prob. PMCh. 5 - Prob. QMCh. 5 - Prob. RMCh. 5 - Prob. SMCh. 5 - Prob. TMCh. 5 - Prob. UMCh. 5 - Prob. VMCh. 5 - Prob. WMCh. 5 - Prob. XMCh. 5 - Prob. YMCh. 5 - Prob. 1MCCh. 5 - Which unit of the following is smaller? (5.2) (a)...Ch. 5 - Prob. 3MCCh. 5 - Prob. 4MCCh. 5 - Prob. 5MCCh. 5 - Prob. 6MCCh. 5 - Prob. 7MCCh. 5 - Which of the following has a definite volume but...Ch. 5 - If the average kinetic energy of the molecules in...Ch. 5 - When we use the ideal gas law, the temperature...Ch. 5 - Prob. 11MCCh. 5 - Prob. 12MCCh. 5 - When a bimetallic strip is heated, it bends away...Ch. 5 - Prob. 2FIBCh. 5 - Prob. 3FIBCh. 5 - Prob. 4FIBCh. 5 - Prob. 5FIBCh. 5 - Prob. 6FIBCh. 5 - Prob. 7FIBCh. 5 - The ___ phase of matter has no definite shape, and...Ch. 5 - Prob. 9FIBCh. 5 - In the ideal gas law, pressure is ___ proportional...Ch. 5 - Prob. 11FIBCh. 5 - Prob. 12FIBCh. 5 - When the temperature changes during the day, which...Ch. 5 - Prob. 2SACh. 5 - The two common liquids used in liquid-in-glass...Ch. 5 - An older type of thermostat used in furnace and...Ch. 5 - Heat may be thought of as the middleman of energy....Ch. 5 - When one drinking glass is stuck inside another,...Ch. 5 - Prob. 7SACh. 5 - What does the specific heat of a substance tell...Ch. 5 - When eating a piece of hot apple pie, you may find...Ch. 5 - Prob. 10SACh. 5 - When you exhale outdoors on a cold day, you can...Ch. 5 - Compare the SI units of specific heat and latent...Ch. 5 - Give two examples each of good thermal conductors...Ch. 5 - Prob. 14SACh. 5 - Prob. 15SACh. 5 - Thermal underwear is made to fit loosely. ( Fig....Ch. 5 - What determines the phase of a substance?Ch. 5 - Give descriptions of a solid, a liquid, and a gas...Ch. 5 - Prob. 19SACh. 5 - How does the kinetic theory describe a gas?Ch. 5 - Prob. 21SACh. 5 - Prob. 22SACh. 5 - Prob. 23SACh. 5 - In terms of kinetic theory, explain why a...Ch. 5 - Prob. 25SACh. 5 - Prob. 26SACh. 5 - Prob. 27SACh. 5 - Prob. 28SACh. 5 - What can be said about the total entropy of the...Ch. 5 - Prob. 30SACh. 5 - Prob. 31SACh. 5 - Prob. 1VCCh. 5 - Prob. 1AYKCh. 5 - Prob. 2AYKCh. 5 - Prob. 3AYKCh. 5 - Prob. 4AYKCh. 5 - Prob. 5AYKCh. 5 - Prob. 6AYKCh. 5 - When you freeze ice cubes in a tray, there is a...Ch. 5 - Prob. 8AYKCh. 5 - Prob. 1ECh. 5 - Prob. 2ECh. 5 - Prob. 3ECh. 5 - Prob. 4ECh. 5 - Researchers in the Antarctic measure the...Ch. 5 - Prob. 6ECh. 5 - A college student produces about 100 kcal of heat...Ch. 5 - Prob. 8ECh. 5 - A pound of body fat stores an amount of chemical...Ch. 5 - Prob. 10ECh. 5 - On a brisk walk, a person burns about 325 Cal/h....Ch. 5 - Prob. 12ECh. 5 - How much heat in kcal must be added to 0.50 kg of...Ch. 5 - Prob. 14ECh. 5 - (a) How much energy is necessary to heat 1.0 kg of...Ch. 5 - Equal amounts of heat are added to equal masses of...Ch. 5 - How much heat is necessary to change 500 g of ice...Ch. 5 - A quantity of steam (300 g) at 110C is condensed,...Ch. 5 - Prob. 19ECh. 5 - A fire breaks out and increases the Kelvin...Ch. 5 - A cylinder of gas is at room temperature (20C)....Ch. 5 - A cylinder of gas at room temperature has a...Ch. 5 - A quantity of gas in a piston cylinder has a...Ch. 5 - If the gas in Exercise 23 is initially at room...
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- One of a dilute diatomic gas occupying a volume of 10.00 L expands against a constant pressure of 2.000 atm when it is slowly heated. If the temperature of the gas rises by 10.00 K and 400.0 J of heat are added in the process, what is its final volume?arrow_forwardA resting adult of average size converts chemical energy in food into internal energy at the rate 120 W, called her basal metabolic rate. To stay at constant temperature, the body must put out energy at the same rate. Several processes exhaust energy from your body. Usually, the most important is thermal conduction into the air in contact with your exposed skin. If you are not wearing a hat, a convection current of warm air rises vertically from your head like a plume from a smokestack. Your body also loses energy by electromagnetic radiation, by your exhaling warm air, and by evaporation of perspiration. In this problem, consider still another pathway for energy loss: moisture in exhaled breath. Suppose you breathe out 22.0 breaths per minute, each with a volume of 0.600 L. Assume that you inhale dry air and exhale air at 37C containing water vapor with a vapor pressure of 3.20 kPa. The vapor came from evaporation of liquid water in your body. Model the water vapor as an ideal gas. Assume that its latent heat of evaporation at 37C is the same as its heat of vaporization at 100C. Calculate the rate at which you lose energy by exhaling humid air.arrow_forwardWhen a gas undergoes an adiabatic expansion, which of the following statements is true? (a) The temperature of the gas does not change. (b) No work is done by the gas. (c) No energy is transferred to the gas by heat. (d) The internal energy of the gas does not change. (e) The pressure increases.arrow_forward
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