Highly polished silvery surfaces are
WebQuestion A polished, silvery surface is a: A Good absorber and good reflector of heat B Good absorber and bad radiator of heat C Poor absorber and good reflector of heat D Poor … WebThe Pros of Polishing Wear. Polishing wear can be used to your advantage. When machine parts are highly polished, there tends to be less drag or friction between the parts. This will help with the equipment’s efficiency by reducing amp draw, fuel consumption and possibly even the operating temperatures. Machine surfaces are often rough with ...
Highly polished silvery surfaces are
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WebIf the surfaces are rough there are far fewer molecules that are close but the rough surface against another rough surface causes friction as in two bricks rubbing against eachother. You can try this with two polished surfaces of metal or glass. Share Cite Improve this answer Follow answered Nov 12, 2015 at 17:26 Peter R 236 1 2 8 Add a comment WebMay 8, 2024 · highly polished silvery surfaces are a.poor absorbers and poor emitters of radiation b. good absorbers but poor emitters of radiation d. poor absorbers but good …
WebSuitable abrasives are silicon carbide (Scotch-brite) pads or wheels, stainless steel pads, and powdered pumice stone. The pumice powder is slurried in a 5% oxalic acid solution and rubbed on with a cloth. All residues must be removed and the surface wiped dry with a clean cloth. Abrasives should not be used on highly polished (mirror) surfaces. WebWhat is the polished silver surface? e maximum radiation pressure exerted by sunlight in space (S 1350 W/m2) on a highly pr A. x 10-2 Pa B. 0.12 Pa c. 90x 10-6 pa D. 4.5 x 10-5 Pa E 23x 10-6 Pa 27. The magnetic field of a plane-polarized electromagnetic wave moving in the z-direction is given by B- 1.2 x 10°sin2240 240in SI units.
WebHighly polished silvery surfaces are: Options A) Poor absorbers but good emitter of radiation B) Good absorbers and good emitters of radiation C) Poor emitters but good reflectors of radiation D) Poor emitters and poor reflectors of radiation Related Lesson: Corner Reflectors and Diamonds Geometric Optics The correct answer is C. WebMar 16, 2024 · The chemical process of coating a glass surface with metallic silver was discovered by Justus von Liebig in 1835, and this advance inaugurated the modern techniques of mirror making. Present …
WebSep 7, 2024 · Silver, for instance, has high reflectivity over the visible range of the spectrum, which makes it colorless when white light is focused on the metal. Gold, however, absorbs the blue and violet regions of the spectrum, leading to a …
WebThe emissivity coefficient - ε - indicates the radiation of heat from a 'grey body' according the Stefan-Boltzmann Law, compared with the radiation of heat from a ideal 'black body' with the emissivity coefficient ε = 1. The emissivity coefficient - ε - for some common materials can be found in the table below. Note that the emissivity coefficients for some products … dick\u0027s eastonWebTypically, and certainly for silver, the 4d→5s transition has a large energy separation requiring ultraviolet photons to enable the transition. Therefore, photons with frequencies … dick\\u0027s eastonWebHighly polished metallic surfaces such as copper or aluminum usually have an emissivity below 0.10. Roughened or oxidized metallic surfaces will have a much higher emissivity (0.6 or greater depending on the surface condition and the amount of oxidation). Most flat-finish paints are around 0.90, while human skin and water are about 0.98. city bites sandwichesWebNote: Because the emissivity of a given material will vary with temperature and surface finish, the value in these tables should be used only as a guide for relative or differential temperature measurements. The exact emissivity of a material should be determined when high accuracy is required. Metals Index city bites walker okcWebJun 29, 2024 · The Norton Guide to Achieving a Perfect Mirror Finish on Stainless Steel with a Right Angle Grinder On stainless steel, a mirror finish is a highly-polished commercial finish characterised by a bright, shiny and reflective surface. You'll most commonly find it in aesthetic pieces, such as public architecture, tapes and furniture. city bites tulsaWebTypically, and certainly for silver, the 4d→5s transition has a large energy separation requiring ultraviolet photons to enable the transition. Therefore, photons with frequencies in the visible band have insufficient energy to be absorbed. city bites walkerWebHighly polished silvery surfaces are A. poor absorbers and poor emitters of radiation B. poor absorbers and good emitters of radiation C. good absorbers and poor emitters of … city bites warr acres menu