Suppose you walk into a sauna that has an ambient temperature of 39.0°C. (a) Calculate the rate of heat transferred to you by radiation given your skin has a temperature of 37.0°C, an emissivity of 0.98, and the surface area of your body is 1.50 m². W (b) If all other forms of heat transfer are balanced (net zero), at what rate will your body temperature increase if your mass is 56 kg? (Assume 3500 J/(kg °C) is the specific heat of human body.) °C/min

Suppose you walk into a sauna that has an ambient temperature of 39.0°C. (a) Calculate the rate of heat transferred to you by radiation given your skin has a temperature of 37.0°C, an emissivity of 0.98, and the surface area of your body is 1.50 m². W (b) If all other forms of heat transfer are balanced (net zero), at what rate will your body temperature increase if your mass is 56 kg? (Assume 3500 J/(kg °C) is the specific heat of human body.) °C/min

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 container holds 0.70 g of argon at a pressure of 7.5 atm. A) How much heat is required to increase the temperature by 100 oC at constant volume? (express the answer in joules). B) How much will the temperature increase if this amount of heat energy is transferred to the gas at constant pressure? (Express your answer in degrees Celsius.)
A ceramic mug is at a temperature of 343 K (about 160°F). The mug has a surface area of about 0.03 m² and ceramic has an emissivity of about 0.9. If the ambient temperature of the room is 293 K (about 70°F), what is the net rate at which energy is lost from the mug by radiation?
The robot HooRU is lost in space, floating around aimlessly, and radiates heat into the depths of the cosmos at the rate of 14.9 W. HOORU's surface area is 1.51 m2 and the emissivity of its surface is 0.217. Ignoring the radiation that HooRU absorbs from the cold universe, what is HOORU's temperature T? т K II
The water in a fishbowl has an evaporation rate of 0.050 g/s. The heat-transfer rate to the bowl by conduction, convection, and radiation is +36 W. At what rate must the water be heated by an electric heater to keep its temperature constant?
What is the rate of heat transfer by radiation, with an unclothed person standing in a dark room whose ambient temperature is 22.0°C. The person has a normal skin temperature of 33.0°C and a surface area of 1.50 m². The emissivity of skin is 0.97 in the infrared, where the radiation takes place.
There is a room where walls are at 25 °C, a steam pipe with a surface temperature of 200 °C, emissivity of 0.8 and diameter of 70 mm is passing through. If the convection heat transfer coefficient is 25 W/m2 K. a) Determine the rate of heat loss from the pipe per unit length of the pipe.
. At what net rate does heat radiate from a 250- m² black roof on a night when the roof's temperature is 30°C and the surrounding temperature is 15°C? The emissivity of the roof is 0.900. The Stefan- Boltzmann's constant is σ =5.67 × 10−8 J/(s m² K4). Hint: The roof radiates heat to the surroundings but also absorbs heat from the surroundings. Use the sign convention for heat leaving and entering a system. Pnet =Q/t= 4.44 x10³× W ! No, that's not the correct answer.
Suppose you walk into a sauna that has an ambient temperature of 50.0ºC . (a) Calculate the rate of heat transfer to you by radiation given your skin temperature is 37.0ºC , 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?
The area of the skin of an adult human being is about 2.10m^2. If the temperature of the skin of an unclothed person is 36.0 degrees C when the surroundings are 26.0 degrees C. What is the rate of heat transfer if the skin reflects 19 % of the heat directed to the surface?
(a) Cherry-red embers in a fireplace are at 850C and have an exposed area of 0.200 m2 and an emissivity of 0.980. The surrounding room has a temperature of 18.0C. If 50% of the radiant energy enters the room, what is the net rate of radiant heat transfer in kilowatts? (b) Does your answer support the contention that most of the heat transfer into a room by a fireplace comes from infrared radiation?
Suppose you walk into a sauna that has an ambient temperature of 65.0°C. (a) Calculate the rate of heat transfer 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 1.50 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 60.0 kg? O A. None of the options provided is correct. O B. a) 1.89 kW, b) 137.7°C/h O C. a) 2 kW, b) 10°C/h ○ D. a) 318.5 W, b) 5.46 °C/h ○ E. a) 5.46 W, b) 318.5 °C/h
If the body’s surface temperature is 35 degrees Celsius, what is the net rate of heat loss on a chilly 4 degrees Celsius day. All human skin is effectively black in the infrared where the radiation occurs, so use an emissivity of 0.97.