Understanding Our Universe
Understanding Our Universe
3rd Edition
ISBN: 9780393614428
Author: PALEN, Stacy, Kay, Laura, Blumenthal, George (george Ray)
Publisher: W.w. Norton & Company,
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Chapter 2, Problem 29QAP
To determine

The credibility of the claim.

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From a distance of 300 km above the surface of the Moon, what is the angular diameter in arc seconds of an astronaut in a space suit who has a linear diameter of 0.80 m as seen from above?
friend are traveling the world and are currently in a city located precisely on the Earth's equator. You are staying in separate rooms at a fancy skyscraper hotel that is 50 floors tall. Your friend's room is several floors above yours. Your rooms are on the same side of the building and both of you have the same clear view of the horizon, which appears featureless and smooth because of a very flat desert. Through the window of your room, you watch the sunset over the smooth horizon from a height of 28 m above the ground, and you see the of the Sun disappear at time ti on your watch. In his room, your friend watches the sunset from a height of 104 m above the ground, and sees the Sun disappear at a later time t2, as measured in his watch, which is perfectly synchronized with yours. Assuming that the Earth has a radius of 6378 km and that it completes a full revolution around its axis in 23 hours, 56 minutes, and 4 seconds, determine the time interval At = t2 – tị between the two sunset…
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