A white flying saucer made of aluminum is in outer space, and the sun is shining on thetop surface of it. It has a surface area of 1 m² per side. The absorptivity (a) for whitepaint is 0.3 to 0.5 for solar radiation (H&H Tbl. 4.1), so a good assumption would be touse the average of 0.4. The emissivity (ɛ) for white paint in the 0-38°C range is 0.9.Incoming solar radiation intensity in outer space is 1353 W/m² (p. 12 in H&H). You mayassume that there is no conductive or convective heat loss from the plate, as it is almost avacuum in outer space.Calculate the equilibrium temperature of the plate, based on the incoming solar radiationand the outgoing radiation from the plate back to outer space.

DefinitionThermal radiation:This topic investigates how electromagnetic waves transmit heat across…

Answered: Calculate the equilibrium temperature…

Calculate the equilibrium temperature of the plate, based on the incoming solar radiation and the outgoing radiation from the plate back to outer space.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

The amount of radiation received per unit time by a person working near a radioactive source, commonly called the dose rate, is measured in rem hr-1. The safety regulations forbid dose rates in excess of 7.5 × 10-4 rem hr-1. The γ dose rate from the 4219K source is found to be 3 × 10-3 rem hr-1 at a distance of 1 m. What is the minimum distance from this source at which itis safe to work? After how long will it be safe to work at a distance of 1 m from the source?
Question 4-83 is the one I need help with
Heat Transfer
You are designing a chamber to contain the radiation emitted by nuclear decay during afusion reaction. The left face of the (plane) chamber wall (? = 0) is exposed to the radiationand the right face of the wall (? = ?) is perfectly insulated. To facilitate the fusion reaction,the left face of the wall is maintained at fixed temperature ?% . The radiation penetrates thewall causing uniform heat generation that varies with location inside the wall as?̇ (?) = ?̇% _1 − ? (?( bwhere ?̇% [W/m^3 ] is a constant. Determine an expression for the temperature distributionin the wall ?(?) assuming the thermal conductivity of the wall (?) is constant.Note: You must start from the HDE, find the general solution to the differential equation,then apply the appropriate BCs to solve for ?(?). You cannot start from the general solutionin Appendix C because that solution assumes constant volumetric heat generation
what about radiation and convection outside and convection inside . please include that in the R, thank you
The door of an oven in the kitchen of a house is 0.5 m high and 0.7 m wide. When the oven is operating, the outside temperature of the door reaches 32°C. Calculate the heat transfer from the oven door towards the room at 22°C, taking into account the effects of radiation. The emissivity of the oven door is 1 and the walls of the kitchen are at 22°C. (σ = 5.67 x 10-8 W/m 2K4 , g = 9.81 m/s2 ) NOTE: More precise values for weather characteristics can be obtained from resources on the internet. Also indicate the source you received.
What are called Maxwell’s relations and explain each term? Write the equations. Are they extremely valuable in thermodynamics?
40% of incident radiant energy on the surface of thermally transparent body is reflected back, if the transmissivity of the body be 0.15 then emissivity of the surface is–
Whereas electron microscopes make use of thewave properties of electrons, ion microscopes make use of the wave propertiesof atomic ions, such as helium ions 1He+2, to image materials. A heliumion has a mass 7300 times that of an electron. In a typical helium-ionmicroscope, helium ions are accelerated by a high voltage of 10–50 kVand focused into a beam onto the sample to be imaged. At these energies,the ions don’t travel very far into the sample, so this type of microscopeis used primarily for the surface imaging of biological structures. The useof helium ions with much greater energies (in the MeV range) has beenproposed as a way to image the entire thickness of a sample, becausethese faster helium ions can pass all the way through biological samplessuch as cells. In this type of ion microscope, the energy lost as the ionbeam passes through different parts of a cell can be measured and relatedto the distribution of material in the cell, with thicker parts of the cellcausing greater…
2. Consider steady heat transfer between two large parallel plates at constant temperatures of T1 = 295 K and T2 = 155 K that are L = 2 cm apart. Assuming the surfaces to be black, determine the rate of heat transfer between the plates per unit surface area assuming the gap between the plates is (a) filled with atmospheric air,(k = 0.01979 W/m- o C) (b) evacuated,(c) filled with superinsulation having an apparent thermal conductivity of 0.00015 W/m · °C.
As an intern on the shop floor of your engineering firm, you are asked to come up with a makeshift door handle for a furnace. When the furnace is in operation, the external surface of the door is approximately 160°C. You search the scrap metal bin and find some sort of carbon steel rod that you believe you can bend into a U-shape and weld to the outer door surface. The rod is 50 cm long with a 6 mm diameter. There is negligible contact resistance through the weld joint and surrounding air at 24°C will cool the handle (h = 15 W/m² · K). a) You know that attaching a metal rod to a hot object might cause someone to get burned, so in analyzing your handle you want to be as cautious as possible. Since you don't know what kind of carbon steel you have found, you will have to estimate its relevant properties. Choose properties of the carbon steel from Table A.1 that will ultimately predict the largest handle temperatures during analysis. b) What is the coolest temperature of the handle? c)…
The heat is dissipated from the plate by convection and radiation into surrounds at 20 C . Take ε =0.8 , σ =5.67×10**-8 and h∞ = 6 W/m**2. K. If the surface temperature of the plate is 50 C ,the value of the heat flux from the plate is :