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Freedman and Kaufmann - Universe 7/e (Homework)

Chris Read

W.H. Freeman, section 1, Fall 2010

Instructor: Mr. Freeman

Current Score : 0 / 12

Due : Wednesday, September 1, 2010 07:00 PM EDT

About this Assignment

Question
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0/4 0/2 0/3 0/2 0/1
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Description

Here are some textbook questions from Universe 7/e by Freedman and Kaufmann published by W. H. Freeman. Click here for a list of all of the questions coded in WebAssign.


Instructions

This demo assignment allows many submissions and makes the answer key available after the first submission so you can see the correct answers. (Typically, the answer key is posted after the due date!)



1. –/4 points Notes Question: FKastro7 1.24.AQ.
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The average distance from Mercury to the Sun is 5.79 107 km. Use powers-of-ten notation for the following questions.
(a) Express this distance in light-years.
Enter a number.
 ly
(b) Express this distance in parsecs.
Enter a number.
 pc
(c) Are light-years or parsecs useful units for describing distances of this size?
    


Explain.


2. –/2 points Notes Question: FKastro7 2.39.AQ.
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The Great Pyramid at Giza has a tunnel that points toward the north celestial pole. At the time the pyramid was built, around 2600 b.c., toward which star did it point? (See Figure 2-18.)
Answer is case sensitive.

Toward which star does this same tunnel point today?
Answer is case sensitive.


3. –/3 points Notes Question: FKastro7 3.27.AQ.
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(a) The Moon moves noticeably over the space of a single night. To show this, calculate how long it takes the Moon to move through an angle equal to its own angular diameter (1/2°) against the background of stars. Give your answer in hours.
Enter a number.
 hours
(b) Through what angle (in degrees) does the Moon move during a 10 hour night?
Enter a number.
°
Can you notice an angle of this size? (Hint: See Figure 1-10.)
    


Figure 1-10



4. –/2 points Notes Question: FKastro7 4.46.AQ.
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Suppose a newly discovered asteroid is in a circular orbit with synodic period 1.84 years. The asteroid lies between the orbits of Mars and Jupiter.
(a) Find the sidereal period of the orbit.
Enter a number.
 years
(b) Find the distance from the asteroid to the Sun.
Enter a number.
 AU


5. –/1 points Notes Question: FKastro7 12.29.AQ.
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If you aim microwaves of wavelength 1.1 cm at the entire face of Venus, what will be the spread in wavelength of the reflected waves caused by the planet's rotation? (See Figure 11-6.)
Enter a number.
 nm


Figure 11.6


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