How do styrofoams, aluminum foils,galss cotton balls help prevent heat lossI know that the aluminus foil reflect the heat back to which it was transferred from but that all i know.:[ PLZ HELP I WOULD LOVE IT A.S.A.P
try doing u like and fell comtorfal with for example: if u like shoes, do shoes, if you are having trouble presenting it think everybody in there underwear
St-foam uses the dead air space trapped in the expansion of the material to kill the temp conversionAluminum foil is a great thermal conductor for convection/conduction heat exchange but does act as a radiant heat barrier by blocking (making shade) IF rays Glass, although used for windows, is a good conductor of convection/conduction and radiant heat.Some types of glass windows have a multiple pane construction .in those the dead air space stops convectionSome glass windows are specially treated to make them low E (emissivity) .this just means the glass stops the radiant heat and UV rays from passing as well as the older plain glass.Cotton balls are great insulators tton has been tested though and found to be only good as long as its dry.Wool on the other hand retains its insulation characteristics even wet So that you get an understanding of this insulation ability let me say that tests have been made to give thermal coefficients for most all solids.the formula for find the rate of transfer is Q u ( a)( T1-T2 ) .u is the thermal coefficient ,,a area ,,,and t1 is temp on side 1,, t2 is temp on side 2.this will give you the thermal transfer in BTU / sq ft.The formulas are real easy to work with but understanding the logical process takes a little time.Good luck with your work.From the E.
what people did for Earth Day this year! the presidential nominees, the Mars Space Program, etc.
