using the following materialspapercarbon paperpencil leadwoolPVC pipe cottonparaffinaluminum diskwaxcopper wiremetal blockClassify them as follow:good conductorsgood insulators or partial insulators
nothing can be usedbcz temperature on sun is 5 to 20 million CIt is very much high than melting point of any thing that is present of earthwhen sun can heat the whole earth then what is any stuff for itit can melt, no, even evaporate everythingso keep solar receptor on earth or some moderately warm star or planet
paper - partial insulator carbon paper - partial insulator pencil lead - good conductor wool - partial insulator PVC pipe - partial insulator cotton - partial insulator paraffin - partial insulator aluminum disk - good conductor wax - partial insulator copper wire - good conductor metal block - good conductor
Something tells me they didn't mean stay warm actually INSIDE the SunAluminium foil is an okay choice, but bear in mind that solar collectors are dark for a reasonDark things tend to absorb heat very easily, which aluminium (conventional spelling is with ium) foil will reflect more lightBear in mind, though that dark materials may also lose heat rapidly, although this shouldn't be a problem if you don't have to keep it warm in the shadeMaterials with high heat capacity and high heat conductivity are best, although since this isn't my area of expertise I can't really think of much that isn't metal or glassPossibly matt black platic? (Don't quote me on that, I'd advise getting a second opinion from someone who is sure)You could try putting a layer of thin matt black plastic ontop of something that will retain a lot of heat, but since I'm no engineer either I'd advise a second opinion on that too!
