PHYSICS 6
SPRING 2006
HOMEWORK 4
(due Thurs. Mar.16)
Read:
Goldstein’s
Notes on Probability (Course Documents)
Hoffmann
, Chapters 28, 11, 13, 14 to p.186. This is to be read over the next two weeks.
It covers the historical development of quantum physics.
You may choose to read all the chapters  they're interesting.
Feynman
, Chapter 6  read for next assignment.
Problems:
(1 and 2 use some basic concepts in probability. There will be a handout.)
1. Assume you have a single normal sixsided die (one of a pair of dice).
(a) What is the probability of getting one 5 in one toss of the die?
(b) What is the probability of getting
only
one 5 in two tosses of the die?
(c) What is the probability of getting
at least
one 5 in two tosses of the die?
(d) What is the probability of getting 0 or 1 or 2 or 3 fives in three tosses of the die?
(e) What is the probability of getting
only
one 5 in eight tosses of the die?
(f)
What is the probability of getting
only
two fives in eight tosses of the die?
2. It is observed that for 1000 radioactive Iodine(131) atoms an average of 455 undergo decay in
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 Spring '06
 GaryR.Goldstein
 Physics, Probability, Energy, Work, Hieronymus Bosch, normal sixsided die

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