ASTR 102 Review Question Sheet - Chapter 1
ANSWER KEY
These practice problems are designed to complement the lectures and textbook readings, and
solidify your understanding of the concepts presented in this course. It will benefit you to think about
the q
ASTR 102 Review Question Sheet - Chapter 3
These practice problems are designed to complement the lectures and textbook readings, and
solidify your understanding of the concepts presented in this class. It will benefit you to think about
the questions tho
ASTR 102 Review Question Sheet - Chapter 6
These practice problems are designed to complement the lectures and textbook readings, and
solidify your understanding of the concepts presented in this course. It will benefit you to think about
the questions th
ASTR 102 Review Question Sheet - Chapter 22
These practice problems are designed to complement the lectures and textbook readings, and
solidify your understanding of the concepts presented in this class. It will benefit you to think about
the questions th
ASTR 102 Review Question Sheet - Chapter 5
These practice problems are designed to complement the lectures and textbook readings, and
solidify your understanding of the concepts presented in this course. It will benefit you to think about
the questions th
ASTR 102 Review Question Sheet - Chapter 23
These practice problems are designed to complement the lectures and textbook readings, and
solidify your understanding of the concepts presented in this class. It will benefit you to think about
the questions th
ASTR 102 Review Question Sheet - Chapter 15
These practice problems are designed to complement the lectures and textbook readings and solidify
your understanding of the concepts presented in this class. It will benefit you to think about the
questions tho
ASTR 102 Review Question Sheet - Chapter 20
These practice problems are designed to complement the lectures and textbook readings and solidify
your understanding of the concepts presented in this class. It will benefit you to think about the
questions tho
ASTR 102 Review Question Sheet - Chapter 18
These practice problems are designed to complement the lectures and textbook readings and solidify
your understanding of the concepts presented in this class. It will benefit you to think about the
questions tho
ASTR 102 Review Question Sheet - Chapter 16
The practice problems are designed to complement the lectures and textbook readings, and solidify
your understanding of the concepts presented in this class. It will benefit you to think about the
questions thor
ASTR 102 Review Question Sheet - Chapter 14
These practice problems are designed to complement the lectures and textbook readings and solidify
your understanding of the concepts presented in this class. It will benefit you to think about the
questions tho
ASTR 102 Review Question Sheet - Chapter 21
These practice problems are designed to complement the lectures and textbook readings, and
solidify your understanding of the concepts presented in this class. It will benefit you to think about
the questions th
ASTR 102 Review Question Sheet Chapter 19
These practice problems are designed to complement the lectures and textbook readings and solidify
your understanding of the concepts presented in this class. It will benefit you to think about the
questions thoro
ASTR 102 Review Question Sheet - Chapter 17
The practice problems are designed to complement the lectures and textbook readings and solidify
your understanding of the concepts presented in this class. It will benefit you to think about the
questions thoro
ASTR 102 Review Question Sheet - Chapter 24
These practice problems are designed to complement the lectures and textbook readings, and solidify
your understanding of the concepts presented in this class. It will benefit you to think about the questions
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ASTR 102.3, Mid-Term Examination, 18 October 2010, 3:30 pm — 4:40 pm
What is the meaning of the word universe?
the orig
ASTR 102.3: Introduction to Galaxies and Cosmology
2nd Mid-Term Examination
Wednesday, November 2, 2011, 4:00-5:20 pm, 143 Arts
1.
A)
B)
C)
D)
At the center of the sun, fusion converts hydrogen nuclei (protons) into
plasma.
helium nuclei.
carbon and oxyge
ASTR 102.3: Introduction to Galaxies and Cosmology
First Mid-Term Examination
Monday, October 3, 2011, 4:00-5:20 pm, 143 Arts
1.
A)
B)
C)
D)
An astronomical unit (AU) is
the age of the universe.
any planets average distance from the sun.
Earths average di
ASTRONOMY 102: INTRODUCTION TO GALAXIES AND COSMOLOGY
PRACTICE EXAM
YOUR NAME:_
YOUR STUDENT NUMBER:_
ONLY THE OPSCAN SHEET WILL BE USED FOR EVALUATION OF YOUR ANSWERS.
HOWEVER, YOU MUST RETURN THIS PROBLEM SHEET WITH THE OPSCAN SHEET.
FOR EACH QUESTION,
ASTRONOMY 102: INTRODUCTION TO GALAXIES AND COSMOLOGY
PRACTICE EXAM
YOUR NAME:_
YOUR STUDENT NUMBER:_
ONLY THE OPSCAN SHEET WILL BE USED FOR EVALUATION OF YOUR ANSWERS.
HOWEVER, YOU MUST RETURN THIS PROBLEM SHEET WITH THE OPSCAN SHEET.
FOR EACH QUESTION,
ASTR 103 Assignment 1
Solutions
1. The diameter of the Sun is 1.4 1011 cm, and the distance to the nearest star, Proxima
Centauri, 4.2 ly. Suppose you want to build a scale model of the Sun and Proxima
Centauri, and you are using a ball 30 cm in diameter
ASTR 103 Assignment 2
Solutions
1. Suppose you traveled to a planet with 4 times the mass of the Earth, and 4 times the
diameter of the Earth. Would you weigh more or less on that planet than on Earth? By
what factor will your weight change?
Solution:
You
ASTR 103 Assignment 4
Solutions
1. Instruments on board balloons and on spacecraft can detect photons which have
energy 511 keV (511 103 eV). What is the wavelength of these photons. To what
part of the electromagnetic spectrum do these photons belong?
So
ASTR 103 Assignment 3
Solutions
1. Stars A and B are both equally bright as seen from the Earth, but A is 120 pc away
while B is 24 pc away. Which star has the greater luminosity? How many times
greater is it?
Solution:
The inverse square law relating bri
ASTR 103 Assignment 6
Solutions
1. To convert one kilogram of hydrogen (1H) into Helium (4He) in the proton-proton
cycle, you must start with 1.5 kg of hydrogen. Explain why, and explain what
happens to the other 0.5 kg.
Solution:
The proton-proton cycle
ASTR 103 Assignment 5
Solutions
1. The bright star Zubeneschmali ( Librae) is of spectral type B8 and has a luminosity
of 130 L. What is the stars approximate surface temperature? How does its radius
compare to that of the Sun?
Solution:
By referring to t
ASTR 103 Assignment 11
Solutions
1. In the binary system of two neutron stars discovered by Hulse and Taylor, one of the
neutron stars is a pulsar. The distance between the stars varied between 1.1 and 4.8
times the radius of the Sun. The time interval be
ASTR 103 Assignment 10
Solutions
1. The Crab nebula has an apparent size of about 5 arcmin, and this size is increasing at
a rate of 0.23 arcsec per year. (a) Assume that the expansion rate has been constant
over the entire history of the Crab Nebula. Und
ASTR 103 Assignment 7
Solutions
1. (a) Find the ratio of the energy flux from a patch of a sunspots penumbra to the
energy flux from an equally large patch of undisturbed photosphere. Which patch is
brighter? (b) Find the ratio of the energy flux from a p