Mathematics and Society - OS X Lion Server

We all know that the Sun gives off a lot of energy. Wereceive this energy in the form of light and heat. Think ofthe Sun as a giant light bulb 149,600,000 km away. How many50-watt light bulbs would we need at the Sun's distance toproduce the same heating effect as the Sun?IMeasure the heating effect of the Sun on an object.Materials: A strip of copper, 6 cm x 3 cm; 1 Celsius thermometer; 1 pencil ordowel rod the same diameter as the thermometer bulb; 1 candle andmatches.a) Lightly pinch the copper aroundthe pencil or dowel rod as shown.b) Bend the ends of the copper backflat.c) Hold the copper over a lightedcandle until the flat surface isevenly coated with soot.d) When the strip cools,slide it from the rodand under the bulb ofthe thermometer.e) Hold the instrument in the shadefor a couple of minutes. Recordthe temperature. Hold theinstrument in direct sunlight fora few minutes (until maximumtemperature is reached). Howmuch was the temperature change?a.)c)DOWEL RODb)BLACK CARBOIIlISA GOOD A8S0RBER.OF' HEAT E~£R.Q,Y.IIMeasure the heating effect of a light bulb on the object.Materials: 50, 60, 100, 150 watt light bulbs andbrackets, pegboard stand, instrumentfrom previous investigation.Use a paper clip to attach the thermometer tothe pegboard so that the copper strip is onthe same horizontal level as the center of thelight bulb...·.... ·····m···. . . . . .. ... . . . ..., ... , .. .. ..... .. · . . .. . .·. . , . . . . .. . '. . .. "· . . . .. . . . ." . . .. '" ....p!!!!t::(l : : ::: : : ::TI-\E WATTNUMBER. OlJT\{E e.ULBTELLS HOWMUCH D.l~RG\(IS PRODUCW\-----J{,EACH SE:CObJo.1) First establish the total temperature change (from room temperature to new (equilibrium temperature) for each light bulb. Be sure each bulb is placed 20 cm76 IDEA FROM: In Orbit- Probing the Natural World, Level Ill, Intermediate Science Curriculum StudyPermission to use granted by Silver Burdett General Learning Corporation