College Physics: A Strategic Approach (4th Edition)
4th Edition
ISBN: 9780134609034
Author: Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 12, Problem 95GP
To determine
To find: How many kilograms of water per hour must be evaporated from an elephant’s skin to keep it at a constant temperature.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
The average thermal conductivity of the walls (including windows) and roof of a house in the figure shown below is 4.8 10-4 kW/m · °C, and their average thickness is 20.8 cm. The house is heated with natural gas, with a heat of combustion (energy given off per cubic meter of gas burned) of 9,300 kcal/m3. How many cubic meters of gas must be burned each day to maintain an inside temperature of 25.9°C if the outside temperature is 0.0°C? Disregard surface air layers, radiation, and energy loss by heat through the ground. m3
A house has a rectangular base and a roof that peaks along a line above the center of the house and parallel to the length of the house. This roof slopes downward from the peak to each edge at an angle of 37.0° with the horizontal. The length of the front of the house is 10.0 meters. The width of the house is 8.00 meters. The height from the front of the house up to the edge of the roof is 5.00 meters.
Many species cool themselves by sweating, because as the sweat evaporates, heat is transferred to the surroundings. A human exercising strenuously has an evaporative heat loss rate of about 659 W. If a person exercises strenuously for 21.9 min, how much water must he drink to replenish his fluid loss? The heat of vaporization of water is 2430 J/g at normal skin temperature.
The average thermal conductivity of the walls (including windows) and roof of a house in the figure shown below is 4.8 x 104 kW/m - °C, and their average thickness is 20.8 cm. The house is heated with natural gas, with a heat of combustion (energy given off per cubic
meter of gas burned) of 9,300 kcal/m3. How many cubic meters of gas must be burned each day to maintain an inside temperature of 27.3°C if the outside temperature is 0.0°C? Disregard surface air layers, radiation, and energy loss by heat through the ground.
m3
37.0
5.00 m
8.00 m
10.0 m
Chapter 12 Solutions
College Physics: A Strategic Approach (4th Edition)
Ch. 12 - Which has more mass, a mole of Ne gas or a mole of...Ch. 12 - If you launch a projectile upward with a high...Ch. 12 - Prob. 3CQCh. 12 - If you double the typical speed of the molecules...Ch. 12 - Two gases have the same number of molecules per...Ch. 12 - If the temperature T of an ideal gas doubles, by...Ch. 12 - A bottle of helium gas and a bottle of argon gas...Ch. 12 - A gas cylinder contains 1.0 mol of helium at a...Ch. 12 - Prob. 9CQCh. 12 - Prob. 10CQ
Ch. 12 - You need to precisely measure the dimensions of a...Ch. 12 - A common trick for opening a stubborn lid on a jar...Ch. 12 - Prob. 13CQCh. 12 - Materials A and B have equal densities, but A has...Ch. 12 - Prob. 15CQCh. 12 - You need to raise the temperature of a gas by 10C....Ch. 12 - Prob. 18CQCh. 12 - Prob. 19CQCh. 12 - A sample of ideal gas is in a cylinder with a...Ch. 12 - A student is heating chocolate in a pan on the...Ch. 12 - If you bake a cake at high elevation, where...Ch. 12 - Prob. 23CQCh. 12 - Prob. 24CQCh. 12 - Prob. 25CQCh. 12 - Prob. 26CQCh. 12 - Prob. 27CQCh. 12 - Prob. 29CQCh. 12 - Prob. 30MCQCh. 12 - Prob. 31MCQCh. 12 - A gas is compressed by an isothermal process that...Ch. 12 - Prob. 33MCQCh. 12 - Prob. 34MCQCh. 12 - Prob. 35MCQCh. 12 - Prob. 36MCQCh. 12 - Prob. 37MCQCh. 12 - Prob. 38MCQCh. 12 - Prob. 1PCh. 12 - How many grams of water (H2O) have the same number...Ch. 12 - Prob. 3PCh. 12 - How many cubic millimeters (mm3) are in 1 L?Ch. 12 - Prob. 5PCh. 12 - Prob. 6PCh. 12 - Prob. 7PCh. 12 - Prob. 8PCh. 12 - An ideal gas is at 20C. The gas is cooled,...Ch. 12 - An ideal gas at 0C consists of 1.0 1023 atoms. 10...Ch. 12 - An ideal gas at 20C consists of 2.2 1022 atoms....Ch. 12 - Prob. 12PCh. 12 - Prob. 13PCh. 12 - When you stifle a sneeze, you can damage delicate...Ch. 12 - Prob. 15PCh. 12 - Mars has an atmosphere composed almost entirely of...Ch. 12 - Prob. 18PCh. 12 - The lowest pressure ever obtained in a laboratory...Ch. 12 - Prob. 20PCh. 12 - Helium has the lowest condensation point of any...Ch. 12 - Prob. 22PCh. 12 - Prob. 23PCh. 12 - Prob. 24PCh. 12 - Prob. 25PCh. 12 - Prob. 26PCh. 12 - A cylinder contains 3.0 L of oxygen at 300 K and...Ch. 12 - Prob. 28PCh. 12 - 0.10 mol of argon gas is admitted to an evacuated...Ch. 12 - Prob. 30PCh. 12 - 0.10 mol of argon gas is admitted to an evacuated...Ch. 12 - 0.10 mol of argon gas is admitted to an evacuated...Ch. 12 - Prob. 33PCh. 12 - Prob. 34PCh. 12 - Prob. 35PCh. 12 - Prob. 36PCh. 12 - A 1.0 cm3 air bubble is released from the sandy...Ch. 12 - A weather balloon rises through the atmosphere,...Ch. 12 - Prob. 39PCh. 12 - Prob. 40PCh. 12 - Prob. 41PCh. 12 - Prob. 42PCh. 12 - The length of a steel beam increases by 0.73 mm...Ch. 12 - Prob. 44PCh. 12 - The length of a steel beam increases by 0.73 mm...Ch. 12 - At 20C, the hole in an aluminum ring is 2.500 cm...Ch. 12 - The temperature of an aluminum disk is increased...Ch. 12 - Prob. 48PCh. 12 - Prob. 49PCh. 12 - Prob. 50PCh. 12 - a. 100 J of heat energy are transferred to 20 g of...Ch. 12 - Prob. 52PCh. 12 - Prob. 53PCh. 12 - Prob. 54PCh. 12 - Alligators and other reptiles dont use enough...Ch. 12 - Prob. 56PCh. 12 - When air is inhaled, it quickly becomes saturated...Ch. 12 - Prob. 58PCh. 12 - Prob. 59PCh. 12 - What minimum heat is needed to bring 100 g of...Ch. 12 - Brewed coffee is often too hot to drink right...Ch. 12 - Prob. 62PCh. 12 - 30 g of copper pellets are removed from a 300C...Ch. 12 - Prob. 64PCh. 12 - A copper block is removed from a 300C oven and...Ch. 12 - Prob. 66PCh. 12 - If a person has a dangerously high fever,...Ch. 12 - A container holds 1.0 g of argon at a pressure of...Ch. 12 - A container holds 1.0 g of oxygen at a pressure of...Ch. 12 - What is the temperature change of 1.0 mol of a...Ch. 12 - Heating 2.5 mol of neon in a rigid container...Ch. 12 - Prob. 72PCh. 12 - A 1.8-cm-thick wood floor covers a 4.0 m 5.5 m...Ch. 12 - A stainless-steel-bottomed kettle, its bottom 24...Ch. 12 - Seals may cool themselves by using thermal...Ch. 12 - Electronics and inhabitants of the International...Ch. 12 - The glowing filament in a lamp is radiating energy...Ch. 12 - Prob. 78PCh. 12 - If you lie on the ground at night with no cover,...Ch. 12 - Prob. 80PCh. 12 - Prob. 81PCh. 12 - Prob. 82PCh. 12 - Prob. 83GPCh. 12 - Prob. 84GPCh. 12 - Prob. 85GPCh. 12 - Prob. 86GPCh. 12 - Prob. 87GPCh. 12 - A 5.0-m-diameter garden pond holds 5.9 103 kg of...Ch. 12 - James Joule (after whom the unit of energy is...Ch. 12 - Prob. 90GPCh. 12 - Prob. 91GPCh. 12 - Prob. 92GPCh. 12 - A 68 kg woman cycles at a constant 15 km/h. All of...Ch. 12 - Prob. 94GPCh. 12 - Prob. 95GPCh. 12 - Prob. 97GPCh. 12 - Your 300 mL cup of coffee is too hot to drink when...Ch. 12 - A gas is compressed from 600 cm3 to 200 cm3 at a...Ch. 12 - An expandable cube, initially 20 cm on each side,...Ch. 12 - Prob. 101GPCh. 12 - Prob. 102GPCh. 12 - Prob. 103GPCh. 12 - Homes are often insulated with fiberglass...Ch. 12 - The surface area of an adult human is about 1.8...Ch. 12 - Prob. 106MSPPCh. 12 - Prob. 107MSPPCh. 12 - Prob. 108MSPPCh. 12 - Prob. 109MSPPCh. 12 - Prob. 110MSPPCh. 12 - Prob. 111MSPPCh. 12 - Prob. 112MSPP
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- One way to cool a gas is to let it expand. When a certain gas under a pressure of 5.00 106 Ha at 25.0C is allowed to expand to 3.00 times its original volume, its final pressure is 1.07 106 Pa. (a) What is the initial temperature of the gas in Kelvin? (b) What is the final temperature of the system? (See Section 10.4.)arrow_forwardTwo concrete spans that form a bridge of length L are placed end to end so that no room is allowed for expansion (Fig. P16.63a). If a temperature increase of T occurs, what is the height y to which the spans rise when they buckle (Fig. P16.63b)?arrow_forwardA glass windowpane in a home is 0.620 cm thick and has dimensions of 1.00 in 2.00 in. On a certain day, the temperature of the interior surface of the glass is 25.0C and the exterior surface temperature is 0C. (a) What is the rate at which energy is transferred by heat through the glass? (b) How much energy is transferred through the window in one day, assuming the temperatures on the surfaces remain constant?arrow_forward
- During heavy exercise, the body pumps 2.00 L of blood per minute to the surface, where it is cooled by 2.00C. What is the rate of heat transfer from this forced convection alone, assuming blood has the same specific heat as water and its density is 1050kg/m3 ?arrow_forwardThe average thermal conductivity of the walls (including windows) and roof of a house in the figure shown below is 4.8 x 104 kW/m - °C, and their average thickness is 21.4 cm. The house is heated with natural gas, with a heat of combustion (energy given off per cubic meter of gas burned) of 9,300 kcal/m3. How many cubic meters of gas must be burned each day to maintain an inside temperature of 24.0°C if the outside temperature is 0.0°C? Disregard surface air layers, radiation, and energy loss by heat through the ground. 34.68 Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. m3 137.00 5.00 m 00 8.00 m 10.0 marrow_forwardAlligators and other reptiles don’t use enough metabolic energy to keep their body temperatures constant. They cool off at night and must warm up in the sun in the morning. Suppose a 300 kg alligator with an early-morning bodytemperature of 25°C is absorbing radiation from the sun at a rate of 1200 W. How long will the alligator need to warm up to a more favorable 30°C? (Assume that the specific heat of the reptilian body is the same as that of the mammalian body.)arrow_forward
- Overall, 80% of the energy used by the body must be eliminated as excess thermal energy and needs to be dissipated. The mechanisms of elimination are radiation, evaporation of sweat (2,430 kJ/kg), evaporation from the lungs (38 kJ/h), conduction, and convection.A person working out in a gym has a metabolic rate of 2,500 kJ/h. His body temperature is 37°C, and the outside temperature 26°C. Assume the skin has an area of 2.0 m2 and emissivity of 0.97. (σ = 5.6696 10-8 W/m2 · K4) (a) At what rate is his excess thermal energy dissipated by radiation? (Enter your answer to at least one decimal place.) W(b) If he eliminates 0.44 kg of perspiration during that hour, at what rate is thermal energy dissipated by evaporation of sweat? (Enter your answer to at least one decimal place.) W(c) At what rate is energy eliminated by evaporation from the lungs? (Enter your answer to at least one decimal place.) W(d) At what rate must the remaining excess energy be eliminated through conduction and…arrow_forwardOverall, 80% of the energy used by the body must be eliminated as excess thermal energy and needs to be dissipated. The mechanisms of elimination are radiation, evaporation of sweat (2,430 kJ/kg), evaporation from the lungs (38 kJ/h), conduction, and convection. A person working out in a gym has a metabolic rate of 2,500 kJ/h. His body temperature is 37°C, and the outside temperature 22°C. Assume the skin has an area of 2.0 m2 and emissivity of 0.97. (o = 5.6696 × 10-8 w/m2 · K4) (a) At what rate is his excess thermal energy dissipated by radiation? (Enter your answer to at least one decimal place.) 1.8e2 W (b) If he eliminates 0.44 kg of perspiration during that hour, at what rate is thermal energy dissipated by evaporation of sweat? (Enter your answer to at least one decimal place.) 3.0e2 W (c) At what rate is energy eliminated by evaporation from the lungs? (Enter your answer to at least one decimal place.) 10.6 W (d) At what rate must the remaining excess energy be eliminated…arrow_forwardThe average thermal conductivity of the walls (including windows) and roof of a house in the figure shown below is 4.8 x 104 kW/m · °C, and their average thickness is 21.4 cm. The house is heated with natural gas, with a heat of combustion (energy given off per cubic meter of gas burned) of 9,300 kcal/m3. How many cubic meters of gas must be burned each day to maintain an inside temperature of 23.5°C if the outside temperature is 0.0°C? Disregard surface air layers, radiation, and energy loss by heat through the ground. 37.00 5.00 m 8,00 m 10.0 marrow_forward
- Homes are often insulated with fiberglass insulation in their walls and ceiling. The thermal conductivity of fiberglass is 0.040 W/(m⋅K). Suppose that the total surface area of the walls and roof of a windowless house is 310 m2 and that the thickness of the insulation is 19 cm. At what rate does heat leave the house on a day when the outside temperature is 30 ∘C colder than the inside temperature?Express your answer in kilowatts.arrow_forwardA container holds 820 kg of ice at a temperature of -24°C. It is heated at a rate of 16 kW for a period of 3,700 seconds. How much of the ice will have melted? specific sensible heat capacity (C₂) kJ/kgk latent heat (L) ki/kg melting point C boiling point C Your Answer: Answer ice liquid water steam ice/water water/steam 1 atmosphere 2.0 4.2 2.0 330 2260 0.0 100arrow_forwardA concrete road surface consists of 15-m long sections separated by gaps to allow for thermal expansion as the weather changes. suppose the expected road surface temperatures vary during the year from a low of -15 degrees Celsius to a high of 45 degrees Celsius. (Note: On a sunny day, road surface temperatures can be much higher than air temperatures.) The road is designed so that there remains a 2.0 mm gap between sections on the hottest day. What is the gap on the coldest day?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Physics for Scientists and Engineers, Technology ...PhysicsISBN:9781305116399Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
College PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
College PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax College
Physics for Scientists and Engineers, Technology ...
Physics
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:OpenStax College