Pearson eText The Cosmic Perspective Fundamentals -- Instant Access (Pearson+)
Pearson eText The Cosmic Perspective Fundamentals -- Instant Access (Pearson+)
3rd Edition
ISBN: 9780135775394
Author: Jeffrey Bennett, Megan Donahue
Publisher: PEARSON+
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Chapter 8, Problem 8QQ

Choose the best answer to etch of the following. Explain your reasoning.

What two pieces of information would you need in order to measure the masses of star in an eclipsing Binary System? (a)the time between Atlas and the average distance between the stars (b) the period of The Binary System and its distance from the Sun (c) the velocities of the stars and the Doppler Shifts of their absorption lines.

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Physics different from a sea breeze from a land breeze
File Preview Design a capacitor for a special purpose. After graduating from medical school you and a friend take a three hour cruise to celebrate and end up stranded on an island. While looking for food, a spider falls on your friend giving them a heart attack. Recalling your physics, you realize you can build a make-shift defibrillator by constructing a capacitor from materials on the boat and charging it using the boat's battery. You know that the capacitor must hold 100 J of energy and be at 1000 V (fortunately this is an electric boat which has batteries that are 1000 V) to work. You decide to construct the capacitor by tightly sandwiching a single layer of Saran wrap between sheets of aluminum foil. You read the Saran wrap box and fortunately they tell you that it has a thickness 0.01 mm and dielectric constant of 2.3. The Saran wrap and foil are 40 cm wide and very long. How long is the final capacitor you build that saves your friend?
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