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Homework 5 - Solutions posted in attachments

Homework 5 - 12 questions

From Chapter 8: Waves (regular textbook)
1, 2, 3, 6

From Extra Chapter 13: Quantum Physics (mainly sections 1 & 2)
http://www.lightandmatter.com/html_books/0sn/ch13/ch13.html
1, 2, 11, 13, 14, 17, 18

NOTE: Chapter 13, problem 8 has been removed from the assignment

For problem 11c, you can use the values N(t) = 3.11 x 10^21 and N(0) = 3.15 x 10^21
EDIT: The correct value for N(0) is actually 3.17 x 10^21 (if you've already done the problem with the first value I gave, don't worry about it!)

Due Thursday, 3/10

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Homework 3 - solutions posted in attachments

Homework 3 - 10 problems

Supplemental Information for Homework 3
(click on actual blog entry for full list!)

Also see the attached powerpoint for more help.

Energy given by a potential (voltage) difference:
Energy = q*V (q is charge, V is the potential difference)

Electric field:
E = -dV/dx
(dV is the change in potential, dx is the distance over which the change occurs)

Energy from a capacitor:
U = 0.5 * C * V^2
(U is energy (Joules), C is capacitance, V is the potential/voltage)

Capacitance for a parallel-plate capacitor:

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Homework 1 - SOLUTIONS POSTED IN ATTACHMENTS

Homework 1

Chapter 1 in Crowell's Conceptual Physics (online textbook)

#2, 7, 8, 11, 13, 16, 17

Due Tuesday, 1/11

SUPPLEMENTAL INFORMATION FOR HW 1: (Note: You do not need to use all of this to do the homework - I simply included equations I found helpful to know when going through the homework).

Power = Energy/Time

Power is in Watts. 1 Watt = 1 Joule/second

1 kJ = 1000 Joules

weight = mass x g (where g is the acceleration due to gravity on the Earth's surface, 9.8 m/s^2)

Force = mass x acceleration (F = ma)

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