Homework 3 handout - HW3 Due Thursday February 13 If words are required in an answer then the answer should be expressed in a complete sentence If a

Homework 3 handout - HW3 Due Thursday February 13 If words...

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HW3: Due Thursday February 13 If words are required in an answer, then the answer should be expressed in a complete sentence. If a number is required in an answer, then the number should have the correct number of significant figures, and should include units. If you are asked a multiple choice question, you are required to indicate all correct answers (and there may be more than one). Remember to show all work, and be legible and clear. Your homework should be returned on a separate piece of paper. 1. Visit one of the major observatory or mission websites (a useful starting point might be of astronomical observatories , the Wikipedia list of astronomical observatories). Find the official website, poke around, and try to locate the image gallery. Find an interesting image of an astronomical object, and answer the following questions. a) What telescope was used to record this image? b) What is the wavelength of light, or region of the electromagnetic spectrum, which is being measured in the image (i.e. visible, radio, x-ray, etc)? c) What astronomical object is it a picture of? d) Describe the picture in detail. Are there any significant features that stand out? What do you find interesting about this image? e) Give the web address where the image is located. 2. Which of the following moves fastest? A) gamma rays B) blue photons C) red light D) radio waves E) none of the above 3. Consider three gases: hydrogen (H), oxygen (O), and radon (Rn). a) Assume that these three elements are not ionized. Assume the atomic mass of hydrogen is 1, oxygen is 16, and radon is 222. How many electrons, neutrons, and protons are present in each of the three atoms?
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