A window has heavy curtains in front of it. At night the curtains are closed to minimise heat loss.During the day the curtains are pulled aside exposing the glass window. How much heat is lostthrough the 1.0 m x 1.0 m square glass window pane that is 4mm thick when the insidetemperature is 20 degree C and the outside temperature is -6 C (negative 6.0) in 12 hrs?( 1m = 100 cm) (1m = 1000mm)%3D Alnilam, a blue supergiant, is the middle star in the famous three-member belt of Orion. Alnilamhas a radius of 2.25 x 10^100 m. The spherical surface behaves as a blackbody radiator. If thesurface temperature is estimated at 25,000 K, what is the rate at which energy is radiated fromthe star?-Meissa-BetelgeuseSurface Area-Bellatrixof aSphere4tr²M78-Mintaka• AlnilamAlnitak-••Sigma Orionis

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