30. GO A solar collector is placed in direct sunlight where it absorbsenergy at the rate of 880 J/s for each square meter of its surface. Theemissivity of the solar collector is e = 0.75. What equilibrium tempera-ture does the collector reach? Assume that the only energy loss is due tothe emission of radiation.

The expression for find equilibrium temperature is Q=eσAT4T=QeσA14

Answered: 30. GO A solar collector is placed in…

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)...

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1
A 12 m by 4.2 m concrete wall has the thickness 8.2 cm. Find the heating rate through this wall if one side of the wall is at 36 C and the other side is at 28°C. The thermal conductivity of this concrete wall is 1.0 W/m-K.
1. Thermography is a technique for measuring radiant heat and detecting variations in surface temperatures that may be medically, environmentally, or militarily meaningful. (a) What is the percent increase in the rate of heat transfer by radiation from a given area at a temperature of 34.3 deg C compared with that at 33.5 deg C, such as on a person's skin? % Increase = % (b) What is the percent increase in the rate of heat transfer by radiation from a given area at a temperature of 34 deg C compared with that at 20.3 deg C, such as for warm and cool automobile hoods? % Increase= %
Please help! A student in a lecture hall has 0.310 m^2 of skin (arms, hands, and head) exposed. The skin is at 34.0°C and has an emissivity of 0.970. The temperature of the room is 20.2°C (air, walls, ceiling, and floor all at the same temperature). The Stefan-Boltzmann constant is 5.670 x 10-8 w/ (m2. k4 ). a) at what rate does the skin emit thermal radiation? b) at what rate does the skin absorb thermal radiation? THANK U
51 A sphere of radius 0.500 m, temperature 27.0°C, and emis- sivity 0.850 is located in an environment of temperature 77.0°C. At what rate does the sphere (a) emit and (b) absorb thermal radia- tion? (c) What is the sphere's net rate of energy exchange?
A 0.217 kg sample of tin initially at 96.9◦Cis dropped into 0.112 kg of water initially at10.2◦C.If the specific heat capacity of tin is230 J/kg ·◦C, what is the final equilibriumtemperature of the tin-water mixture? Thespecific heat of water is 4186 J/kg ·◦C.Answer in units of ◦C.
3. A 3.2 m length of copper pipe extends directly from a hot-water heater in a basement to a faucet on the first floor of a house. If the faucet isn't fixed in place, how much will it rise when the pipe is heated from 20.0° C to 85.9° C. The coefficient of linear expansion for copper is 1.6*10-5 K−1.
Suppose a skier standing in the shade is completely clothed in white (head to foot, including a ski mask), with clothes that have an emissivity of 0.200 and a surface temperature of 12.5°C. The surroundings are at -15°C and her surface area is 1.55 m2. a. Find the net rate of heat transfer, in watts, via radiation from the skier.
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Determine the energy transferred by conduction in 16 minutes, between the two faces of a concrete wall with an area of 24.2 m ^ 2 and a thickness of 29.2 cm, if inside the temperature is 16.1 ° C, and outside the temperature is 31.4 ° C.
A 1500-W hotplate is used to heat up a 1.04kg aluminum pot filled with 1.22kg of water and a 0.855kg lead mass for 5 minutes. If the initial temperature of the system was 72 degrees F, find the final equilibrium temperature. Assume that all the energy of the hot plate goes into the system. (C water = 4180 J/kg*K , C aluminum - 910 J/kg*K, C lead = 160 J/kg*K).
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?

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