Essential Cosmic Perspective
Essential Cosmic Perspective
9th Edition
ISBN: 9780135795033
Author: Bennett
Publisher: PEARSON
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Chapter 1, Problem 35EAP

Thinking About Scale. One key to success m science is finding a simple way to evaluate new ideas, and making a simple scale model is often helpful. Suppose someone tells you that the reason it is warmer during the day then at night is that the day side of Earth is closer to the Sun then the night side. Evaluate this idea by thinking about the size of Earth and Is distance from the Sun in a scale model of the solar system.

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Use Kepler's 3rd Law and the small angle approximation. a) An object is located in the solar system at a distance from the Sun equal to 41 AU's . What is the objects orbital period? b) An object seen in a telescope has an angular diameter equivalent to 41 (in units of arc seconds).  What is its linear diameter if the object is 250 million km from you?  Draw a labeled diagram of this situation.
The mass of the Earth is about 6 x 1021 metric tons, and the mass of the Sun is about 2 x 1027 metric tons.  About how many times more is the mass of the sun compared to the mass of the Earth? Put the numbers into Scientific Notation.  Do your calculations using the product or quotient rule.  Then write your answer as a Standard Number.  What is the proper name of the answer?
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Essential Cosmic Perspective

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Kepler's Three Laws Explained; Author: PhysicsHigh;https://www.youtube.com/watch?v=kyR6EO_RMKE;License: Standard YouTube License, CC-BY