EBK UNDERSTANDING OUR UNIVERSE (THIRD E
3rd Edition
ISBN: 9780393631760
Author: Blumenthal
Publisher: VST
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Chapter 2, Problem 21QAP
To determine
The agreement or disagreement of the observer with one of the given hypotheses.
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When you step from the shade into the sunlight, the Sun’s heat is as evident as the heat from hot coals in a fireplace in an otherwise cold room. You feel the Sun’s heat not because of its high temperature (higher temperatures can be found in some welder’s torches), but because the Sun is big. Which do you estimate is larger, the Sun’s radius or the distance between the Moon and Earth? Check your answer in the list of physical data on the inside back cover. Do you find your answer surprising?
Use the table to answer questions 13 through 15.
A student collects the following data about the Sun, stars, moon, and Earth.
Time of Day Sun Visible Moon Visible Stars Visible
5 am
Sun Location
Near horizon
Above horizon
Overhead
Yes
No
Yes
10 am
No
Yes
No
No
1 pm
5 pm
9 pm
Yes
No
Near horizon
No
Yes
No
Not visible
No
Yes
Yes
O What research question is the student investigating?
A. How long does it take Earth to rotate on its axis?
B. Does the moon rotate at a faster rate than Earth does?
C. How do the locations of the stars relate to the moon?
D. What is the relationship between time of day and seeing objects in
the sky?
The timing of Moonrise is later every day. Let’s understand why: a) Moonrise occurs when you, as you sit on the rotating Earth, turn to the point where you can just see the Moon appear over the horizon. Draw a picture to illustrate what this would look like. Draw the Earth, Moon, and you standing on the Earth to indicate this scenario. (You’ve seen my artistic skills in class, I’m not asking you to do anything better than that. Just label/make clear what is shown). Take this as Day 1.In 24 hours, you would return back to that exact point on the Earth. However, the Moon will also have moved forward in its orbit (it orbits the Earth in the same direction that the Earth is spinning). How far along in its orbit does the Moon move? That is, assume the Moon is orbiting in a circular orbit; in going from Day 1 to Day 2,
how many degrees does thee Moon move forward? Indicate (very roughly) via a drawing.b) Because the Moon advanced in its orbit, you now must wait…
Chapter 2 Solutions
EBK UNDERSTANDING OUR UNIVERSE (THIRD E
Ch. 2.1 - Prob. 2.1CYUCh. 2.2 - Prob. 2.2CYUCh. 2.3 - Prob. 2.3CYUCh. 2.4 - Prob. 2.4CYUCh. 2 - Prob. 1QAPCh. 2 - Prob. 2QAPCh. 2 - Prob. 3QAPCh. 2 - Prob. 4QAPCh. 2 - Prob. 5QAPCh. 2 - Prob. 6QAP
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- Based on what you've learn on the impact of the Earth-Sun distance on the seasons, what can you say about the the cause of the seasons? (Give ALL correct answers, i.e., B, AC, BCD...)A) Earth's axis is tilted an an angle of 23.5 degrees compared to a line perpendicular (straight up and down) to its orbit, which is the main cause for the seasons.B) Earth's speed varies in its orbit around the Sun, giving us summer when Earth is moving fastest and winter when Earth is moving slowest.C) The Earth-Sun distance play a major role in creating seasons on Earth.D) The tilt of Earth's axis causes the Northern Hemisphere to be closer to the Sun than the southern hemisphere in summer, and vice versa in winter. E) The tilt of Earth's axis causes different portions of the Earth to receive more or less direct sunlight at different times of year.F) Earth's Northern Hemisphere is always tilted away from the Sun at an angle of 23.5 degrees.G) Earth's Northern Hemisphere is always tilted toward the Sun…arrow_forwardThe 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?arrow_forwardThere are 12 lunar months in a lunar calendar. The numbers of days of the lunar months differ by at most one day. The average number of days of a lunar month is approximately equal to the period of the lunar phase cycle. One year in a solar calendar is approximately equal to the period of the cycle of seasons. Which of the following can roughly keep a lunar calendar synchronized with a solar calendar? a) Adding a thirteenth lunar month to 7 out of every 19 years. b) Adding an extra day every 4 years. c) Having an extra month with 5 days each year. d) Skipping a lunar month every 7 out of 19 years.arrow_forward
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