hw4 - 2. [5 pts] [Chapter 14, question 47] Chemical Burning...

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Homework 4 – due by September 28 1. [5 pts] [Chapter 6, question 48] Your Satellite Dish . Suppose you have a satellite dish that is 0.5 meter in diameter and you want to use it as a radio telescope. What is the diffraction limit on the angular resolution of your dish, assuming that you want to observe radio waves with a wavelength of 21 centimeters? Would it be very useful as an astronomical radio telescope?
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Unformatted text preview: 2. [5 pts] [Chapter 14, question 47] Chemical Burning of the Sun . Estimate how long the Sun would last if it were merely a huge fire that was releasing chemical energy. Assume that the Sun begins with roughly 10 8 joules per kilogram, a chemical energy content typical of atomic matter. Express your final answer in years. Show your calculation steps....
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