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Unformatted text preview: HW7 (Homework) Rebecca Densen PHY 121, Fall 2011 Instructor: Dejan Stojkovic Current Score : 7 / 7 Due : Friday, November 4 2011 11:00 PM EDT Adjustment: +1 1. 1/1 points | Previous Answers SeedsHorizons12 6.P.05. If one star has a temperature of 6200 K and another star has a temperature of 7300 K, how much more energy per second will the hotter star radiate from each square meter of its surface? 1.92 1.92 times 2. 1/2 points | Previous Answers SeedsHorizons12 6.P.09. In a laboratory, the Balmer beta line has a wavelength of 486.1 nm. If the line appears in a star's spectrum at 485.4 nm, what is the star's radial velocity?-432.0099 432 km/s Is it approaching or receding? Web Assign The due date for this assignment is past. Your work can be viewed below, but no changes can be made. Important! Before you view the answer key, decide whether or not you plan to request an extension. Your Instructor may not grant you an extension if you have viewed the answer key. Automatic extensions are not granted if you havegrant you an extension if you have viewed the answer key....
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