An astronaut is landing on the Moon. What will be the angular diameter of the Earth that he will observe? (a) .52 deg (b) 1.1 deg (c) 1.91 deg (d) 0.955 deg (e) none of the above Solution: Distance D = 384000 km Earth radius REarth = 6400 km Moon’s radius RMoon = 1737 km

An astronaut is landing on the Moon. What will be the angular diameter of the Earth that he will observe? (a) .52 deg (b) 1.1 deg (c) 1.91 deg (d) 0.955 deg (e) none of the above Solution: Distance D = 384000 km Earth radius REarth = 6400 km Moon’s radius RMoon = 1737 km

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter1: Introduction And Vectors

Section: Chapter Questions

Problem 20P

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Concept explainers

Central Force

Central force is the force that acts along the center of mass of one body to the center of mass of another body. Its direction from or away from a point on a body to another is called the center of the force. Such forces include gravitational force between two massive objects or electrostatic forces between two charged particles. So from atoms to planets, the central forces play an important role in shaping our daily lives. One of the remarkable features of central forces is that they are conservative, i.e. the total energy of a central force system can always be expressed as a gradient of a potential energy function.

Question

An astronaut is landing on the Moon. What will be the angular diameter of the Earth that he will observe?

(a) .52 deg
(b) 1.1 deg
(c) 1.91 deg
(d) 0.955 deg
(e) none of the above Solution:

Distance D = 384000 km
Earth radius REarth = 6400 km
Moon’s radius RMoon = 1737 km

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