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PROBLEM SET 1
Physics 2022
1.
The average distance from the Earth to the Sun is 1.496 x 10
8
km.
Express this distance (a) in
lightyears and (b) in parsecs.
Use powersoften notation.
(c) Are lightyears or parsecs useful
units for describing distances of this size?
Explain.
2.
When the Voyager 2 spacecraft sent back pictures of Neptune during its flyby of the planet in
1989, the spacecraft’s radio signals traveled for 4 hours at the speed of light to reach Earth.
How
far away was the spacecraft?
Give your answer in kilometers, using powersoften notation.
3.
The star Procyon is 3.50 pc from Earth.
(a) What is the distance to Procyon in kilometers?
Use powersoften notation.
(b) How long does it take for light emanating from Procyon to
reach Earth?
Give your answer in years.
4.
The age of the universe is about 14 billion years.
What is this age in seconds?
Use powers
often notation.
5.
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This note was uploaded on 04/07/2011 for the course PHYS 2022 taught by Professor Sowell during the Spring '11 term at Georgia Tech.
 Spring '11
 sowell
 Power, Light

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