What does a high temperature reading on a solar cell indicate?
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What does a high temperature reading on a solar cell indicate?
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- 2:140.9 PPPPY 1³ 5000 10000 15000 15000 15000 15000 20000 ¿acuejsqns siui jo juod dugog BUI SI LEUM Heating Curve for one Gram of Substance 25°C BOY: 30 3 J Temperature (C) F DJUELSONS UMOuyun ve jo aruno Bugeay ay swoys ydajö ayı Question 4Discuss in terms of physics why restaurants serve baked potatoes wrapped in aluminum foil.The next four questions use this description. Our Sun has a peak emission wavelength of about 500 nm and a radius of about 700,000 km. Your dark-adapted eye has a pupil diameter of about 7 mm and can detect light intensity down to about 1.5 x 10-11 W/m2. Assume the emissivity of the Sun is equal to 1. First, given these numbers, what is the surface temperature of the Sun in Kelvin to 3 significant digits? What is the power output of the Sun in moles of watts? (in other words, take the number of watts and divide it by Avogadro's number) Assuming that all of the Sun's power is given off as 500 nm photons*, how many photons are given off by the Sun every second? Report your answer to the nearest power of 10 (e.g. if you got 7 x 1024, give your answer as 25).
- A certain furnace (essentially a blackbody) emits 300 W of power when operating at a temperature of 1 Kelvin. How much power will this furnace emit when the temperature is increase to 4 Kelvin?An incandescent lightbulb is only about 5% efficient at converting electrical energy to radiant energy. Does this mean that the Conservation of Energy does not apply for this situation? Explain.