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categoryفيزياء
schoolبكالوريوس
event_available2026-07-14
السؤال
Transcribed Image Text:
In this exercise, we will be working with standard dice.
(a) What are the states of one standard (6-sided) die?
What is the probability of each state occurring?
(b) Consider a system of two standard dice. How many
microstates are there? How many macrostates are there?
(c) What are the macrostates? How many microstates are there in each macrostate? What is
the probability that each macrostate will occur when rolling two dice. List every
microstate, e.g., using two columns, then compute the macrostate n that each is in, e.g., by
adding the two columns. Find the number of microstates in each macrostate and compute
the probability P(n) of each macrostate occurring. Check to make sure the sum of the
numbers of microstates is equal to the total number of microstates. Check also that the
total probability is correct.
(d) What is the most likely macrostate?
(e) Plot a histogram of the probability P(n) vs. macrostate n.
For part (b), you should use formulas to compute the total number of microstates and the total
number of macrostates. (For the total number of macrostates, the formula is tricky, so make sure
it works for three and four dice.) Make a list of the macrostates, as we have done before. You will
need this list for part (e).
Note that part (c) is done differently from what we have done in class, e.g., for N = 4 coins. Instead
of imagining all of the combinations for a particular macrostate (and possibly missing some of
them), do this: Set up two columns, one showing the value of one die and another showing the
value of the other die. Find a systematic way to make sure you have every combination, e.g., for
the first column, list the states of one die, then repeat this for each state of the second die. Thus,
the first four rows might look like this...
die 1
die 2
1
1
2
1
3
4
1
1
The next column contains the sum of these two columns, which is the macrostate of each
microstate. Use COUNTIF to find the number of microstates in each macrostate. These values
should go into the column next to your list of n values (macrostates), so that you can make the
histogram easily.
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