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Fill in the box with the correct answer (answers should be just a few words or a number). 1. What temperature scale (Fahrenheit, Celsius, Kelvin) do

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Fill in the box with the correct answer (answers should be just a few words or  a number). 1. What temperature scale (Fahrenheit, Celsius, Kelvin) do most  astronomers use in their calculations? What is the relationship between  a) Fahrenheit and Celsius degrees, and b) Kelvin and Celsus degrees? 2. The Stefan-Boltzmann Law says that the total energy radiated in 1  second from 1 square meter of an object is given by the equation  E= T 4  and the energy is expressed in Joules (see Chapter 7 of the  book). If the surface of the sun's photosphere is about 6000 K and a  sunspot is about 4000 K what fraction less energy is radiated in 1  second from 1 square meter of a sunspot than from 1 square meter of  the sun's photosphere? 3. Consider two stars of the same size. Star A appears red. Star B appears  blue. If both stars appear to have the same brightness when seen in the  night sky, which one is closer to us? (Think about the following  questions: Which star is hotter? If they were placed side by side, which  one would be brighter?) 4. How much does the luminosity of a spherical blackbody increase if you  triple its size?
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5. Which is coldest: 100 degrees Farenheit, 100 degrees Celsius, or 100  degrees Kelvin? 6. The wavelength of the Hydrogen Balmer line H-alpha is 656.3 nm. You  obtain a spectrum of a distant galaxy, and discover that the H-alpha line  coming from that galaxy has wavelength equal to 700 nm. Which  physical phenomenon are you observing? How fast and in which  direction is that galaxy moving respect to Earth? How would your  answers change if the wavelength of the line were observed at 600.0 nm  instead? 7. Suppose you are approaching a red traffic light with your car. How fast  do you need to drive so that the red traffic light looks green to you (and  you get a ticket only for speeding, but not for running the red light)?  Assume that the red light has wavelength equal to 650 nm and the  green light has wavelength equal to 550 nm. 8. A 2 liter bottle of Coke weighs about 2 kilograms. If that bottle were  combined with an equal amount of anti-Coke so that both liquids  annihilate and get transformed in pure electromagnetic energy (gamma  rays), how many Joules of energy would be released (note that you get 
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