Astronomy
1st Edition
ISBN: 9781938168284
Author: Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher: OpenStax
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Textbook Question
Chapter 2, Problem 39E
What did Galileo discover about the planet Jupiter that cast doubt on exclusive geocentrism?
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Problem Eight. A snowmobile is originally at the point with position vector 31.1 m at 95.5°
counterclockwise from the x-axis, moving with velocity 4.89 m/s at 40.0°. It moves with constant
acceleration 1.73 m/s² at 200°. After 5.00 s have elapsed, find the following.
9.) The velocity vector in m/s.
(A)=-4.38+0.185ĵ
(D) = 0.185 +4.38ĵ
(B)=0.1851-4.38ĵ
(E) = 4.38 +0.185ĵ
(C) v=-0.1851-4.38ĵ
(A)=-39.3-4.30ĵ
10.) The final position vector in meters.
(B)=39.3-4.30ĵ
(C) = -4.61 +39.3ĵ
(D) = 39.31 +4.30ĵ
(E) = 4.30 +39.3ĵ
Problem Seven. A football
receiver
running
straight
downfield at 5.60 m/s is 11.5 m
in front of the quarterback when
a pass is thrown downfield at an
angle of 35.0° above the
horizon.
8.) If the receiver never changes speed and the ball is caught at the same height from which it was
thrown, find the distance between the quarterback and the receiver when the catch is made.
(A) 21.3
(B) 17.8
(C) 18.8
(D) 19.9
(E) 67.5
3
Consider a ball sliding down a ramp as shown above. The ball is already in motion at
the position 1.
Which direction best approximates the direction of instantaneous velocity vector
V when the object is at position 3?
Chapter 2 Solutions
Astronomy
Ch. 2 - From where on Earth could you observe all of the...Ch. 2 - Give four ways to demonstrate that Earth is...Ch. 2 - Explain, according to both geocentric and...Ch. 2 - In what ways did the work of Copernicus and...Ch. 2 - What were four of Galileo’s discoveries that were...Ch. 2 - Explain the origin of the magnitude designation...Ch. 2 - Ursa Minor contains the pole star, Polaris, and...Ch. 2 - How many degrees does the Sun move per day...Ch. 2 - How many degrees does the Moon move per day...Ch. 2 - Explain how the zodiacal constellations are...
Ch. 2 - The Sun was once thought to be a planet. Explain...Ch. 2 - Is the ecliptic the same thing as the celestial...Ch. 2 - What is an asterism? Can you name an example?Ch. 2 - Why did Pythagoras believe that Earth should be...Ch. 2 - How did Aristotle deduce that the Sun is farther...Ch. 2 - What are two ways in which Aristotle deduced that...Ch. 2 - How did Hipparchus discover the wobble of Earth’s...Ch. 2 - Why did Ptolemy have to introduce multiple circles...Ch. 2 - Why did Copernicus want to develop a completely...Ch. 2 - What two factors made it difficult, at first, for...Ch. 2 - What phases would Venus show if the geocentric...Ch. 2 - Describe a practical way to determine in which...Ch. 2 - What is a constellation as astronomers define it...Ch. 2 - Draw a picture that explains why Venus goes...Ch. 2 - Show with a simple diagram how the lower parts of...Ch. 2 - Parallaxes of stars were not observed by ancient...Ch. 2 - Why do you think so many people still believe in...Ch. 2 - Consider three cosmological perspectives-the...Ch. 2 - The north celestial pole appears at an altitude...Ch. 2 - What were two arguments or lines of evidence in...Ch. 2 - Although the Copernican system was largely correct...Ch. 2 - During a retrograde loop of Mars, would you expect...Ch. 2 - The Great Pyramid of Giza was constructed nearly...Ch. 2 - Explain why more stars are circumpolar for...Ch. 2 - What is the altitude of the north celestial pole...Ch. 2 - If you were to drive to some city south of your...Ch. 2 - Hipparchus could have warned us that the dates...Ch. 2 - Explain three lines of evidence that argue against...Ch. 2 - What did Galileo discover about the planet Jupiter...Ch. 2 - What did Galileo discover about Venus that cast...Ch. 2 - Suppose Eratosthenes had found that, in...Ch. 2 - Suppose Eratosthenes’ results for Earth’s...Ch. 2 - Suppose you are on a strange planet and observe,...
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