A person's body is producing energy internally due to metabolicprocesses. If the body loses more energy than metabolic pro-cesses are generating, its temperature will drop. If the drop is severe, itcan be life-threatening. Suppose that a person is unclothed and energy isbeing lost via radiation from a body surface area of 1.40 m², which hasa temperature of 34 °C and an emissivity of 0.700. Also suppose thatmetabolic processes are producing energy at a rate of 115 J/s. What is thetemperature of the coldest room in which this person could stand and not26.experience a drop in body temperature?

By Stefan- Boltzman law, Net radiated power per unit area is mathematically written as: PA= e.σ.…

Answered: A person's body is producing energy…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

A heater of total radiating surface area of 0.50 m2 is kept at a constant temperature of 100oC. The heater is in a room and keeps the room at a temperature of 25oC. If the emissivity of the heater is 0.8, what is the rate at which the heater supplies heat to the room? σ = 5.67 x 10-8 W/m2K4
SANAE IV, a research station of The South African National Antarctic Programme (SANAP), is located on Vesleskarvet, Queen Maud Land. It uses an underground lake as the cold reservoir of a Carnot heat pump that maintains the temperature of a science lab at 302.8 K. To deposit 13488 J of heat in the lab, the heat pump requires 1022 J of work. Determine the temperature of water in the underground lake, in Kelvin
Suppose you walk into a sauna that has an ambient temperature of 52.0°C. (a) Calculate the rate of heat transfer in watts to you by radiation given your skin temperature is 37.0°C, the emissivity of skin is 0.98, and the surface area of your body is 1.40 m2. W (b) If all other forms of heat transfer are balanced (the net transfer is zero), at what rate will your body temperature increase in degrees Celsius per minute if your mass is 70 kg? °C/min
Calculate the rate of energy transferred via radiation from the surface of a spherical ice cube with radius 0.014 m. The air temperature is 295 K and the surface of the ice cube is 273 K. The emissivity of the ice cube's surface is 0.24.
Large meteors sometimes strike the Earth, converting most of their kinetic energy into thermal energy. (a) What is the kinetic energy of a 109kg meteor moving at 25.0 km/s? (b) If this meteor lands in a deep ocean and 80% of its kinetic energy goes into heating water, how many kilograms of water could it raise by 5.0°C?
A student is trying to decide what to wear. His bedroom is at 20°C. His skin temperature is 35°C. The area of his exposed skin is 1.50 m². People of all races have skin that is dark in the infrared, with emissivity about 0.900. Find the net energy loss from his body by radiation in 10.0 min.
To keep yourself warm in the winter, you heat a solid metal ball and place it on a stand in the center of your room. The ball has a radius of 17.0 cm and an emissivity of 0.830. If your room has a temperature of 15°C, what is the net power radiated by the ball initially, when the ball's temperature is 200°C?
Hi there! Can you help em figure this problem. I keep gettign 707 watts and that is not correct. Seals may cool themselves by using thermal windows, patches on their bodies with much higher than average surface temperature. Suppose a seal has a 0.030 m2 thermal window at a temperature of 30∘C. If the seal's surroundings are a frosty -15 ∘C, what is the net rate of energy loss by radiation? Assume an emissivity equal to that of a human. Express the answer in watts. Thank you for the help! It is appreicated.
Suppose you walk into a sauna that has an ambient temperature of 50.0C. (a) Calculate the rate of heat transfer to you by radiation given your skin temperature is 37.0C, the emissivity of skin is 0.98, and the surface area of your body is 1.50 m2. (b) If all other forms of heat transfer are balanced (the net heat transfer is zero), at what rate will your body temperature increase if your mass is 75.0 kg?
Solar panels on one of the NWU solar car prototype, have an emissivity of e = 0.819. When in direct sunlight, they absorb energy at a rate of 877 J/s per square meter of surface. Assume that the only energy loss is due to the emission of radiation. What equilibrium temperature are the panels reaching?
Earth absorbs energy from the Sun at a rate of 1.7* 10^17 W. About this much energy is emitted away as radiation. Suppose a scientist takes Earth emissivity as 1. find the average surface temperature of Earth to be deg C.
The surface area of an unclothed person is 1.55 m2, and his skin temperature is 33.0°C. The person is located in a dark room with a temperature of 17.0°C, and the emissivity of the skin is e = 0.95. (Include the sign of the value in your answer.) (a) At what rate is energy radiated by the body?W(b) What is the significance of the sign of your answer?

Recommended textbooks for you

College Physics

Physics

ISBN:

9781305952300

Author:

Raymond A. Serway, Chris Vuille

Publisher:

Cengage Learning

University Physics (14th Edition)

Physics

ISBN:

9780133969290

Author:

Hugh D. Young, Roger A. Freedman

Publisher:

PEARSON

Introduction To Quantum Mechanics

Physics

ISBN:

9781107189638

Author:

Griffiths, David J., Schroeter, Darrell F.

Publisher:

Cambridge University Press

College Physics

Physics

ISBN:

9781305952300

Author:

Raymond A. Serway, Chris Vuille

Publisher:

Cengage Learning

University Physics (14th Edition)

Physics

ISBN:

9780133969290

Author:

Hugh D. Young, Roger A. Freedman

Publisher:

PEARSON

Introduction To Quantum Mechanics

Physics

ISBN:

9781107189638

Author:

Griffiths, David J., Schroeter, Darrell F.

Publisher:

Cambridge University Press

Physics for Scientists and Engineers

Physics

ISBN:

9781337553278

Author:

Raymond A. Serway, John W. Jewett

Publisher:

Cengage Learning

Lecture- Tutorials for Introductory Astronomy

Physics

ISBN:

9780321820464

Author:

Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina Brissenden

Publisher:

Addison-Wesley

College Physics: A Strategic Approach (4th Editio…

Physics

ISBN:

9780134609034

Author:

Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field

Publisher:

PEARSON

SEE MORE TEXTBOOKS