Mathematical Methods in the Physical Sciences
3rd Edition
ISBN: 9780471198260
Author: Mary L. Boas
Publisher: Wiley, John & Sons, Incorporated
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Chapter 15.2, Problem 3P
Set up an appropriate
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3. Verify that the indicated function (or family of functions) is a solution of the given differential equation. Assume an
appropriate interval I of definition for each solution.
The average number of minutes Americans commute to work is 27.7 minutes (Sterling's Best Places, April 13, 2012). The average commute time in minutes for 48 cities are as follows:
Click on the datafile logo to reference the data.
DATA file
Albuquerque
23.3
Jacksonville
26.2
Phoenix
28.3
Atlanta
28.3
Kansas City
23.4
Pittsburgh
25.0
Austin
24.6
Las Vegas
28.4
Portland
26.4
Baltimore
32.1
Little Rock
20.1
Providence
23.6
Boston
31.7
Los Angeles
32.2
Richmond
23.4
Charlotte
25.8
Louisville
21.4
Sacramento
25.8
Chicago
38.1
Memphis
23.8
Salt Lake City
20.2
Cincinnati
24.9
Miami
30.7
San Antonio
26.1
Cleveland
26.8
Milwaukee
24.8
San Diego
24.8
Columbus
23.4
Minneapolis
23.6
San Francisco
32.6
Dallas
28.5
Nashville
25.3
San Jose
28.5
Denver
28.1
New Orleans
31.7
Seattle
27.3
Detroit
29.3
New York
43.8
St. Louis
26.8
El Paso
24.4
Oklahoma City
22.0
Tucson
24.0
Fresno
23.0
Orlando
27.1
Tulsa
20.1
Indianapolis
24.8
Philadelphia
34.2
Washington, D.C.
32.8
a. What is the mean commute time for…
(b)
313
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dx
-y= 10 sin(2x)y;
y(x) = ex-5 cos(2x)
Chapter 15 Solutions
Mathematical Methods in the Physical Sciences
Ch. 15.1 - If you select a three-digit number at random, what...Ch. 15.1 - Three coins are tossed; what is the probability...Ch. 15.1 - In a box there are 2 white, 3 black, and 4 red...Ch. 15.1 - A single card is drawn at random from a shuffled...Ch. 15.1 - Given a family of two children (assume boys and...Ch. 15.1 - A trick deck of cards is printed with the hearts...Ch. 15.1 - A letter is selected at random from the alphabet....Ch. 15.1 - An integer N is chosen at random with 1N100. What...Ch. 15.1 - You are trying to find instrument A in a...Ch. 15.1 - A shopping mall has four entrances, one on the...
Ch. 15.2 - Set up an appropriate sample space for each of...Ch. 15.2 - Set up an appropriate sample space for each of...Ch. 15.2 - Set up an appropriate sample space for each of...Ch. 15.2 - Set up an appropriate sample space for each of...Ch. 15.2 - Set up an appropriate sample space for each of...Ch. 15.2 - Set up an appropriate sample space for each of...Ch. 15.2 - Set up an appropriate sample space for each of...Ch. 15.2 - Set up an appropriate sample space for each of...Ch. 15.2 - Set up an appropriate sample space for each of...Ch. 15.2 - Set up an appropriate sample space for each of...Ch. 15.2 - Set up several nonuniform sample spaces for the...Ch. 15.2 - Use the sample space of Example 1 above, or one or...Ch. 15.2 - A student claims in Problem 1.5 that if one child...Ch. 15.2 - Two dice are thrown. Use the sample space ( 2.4 )...Ch. 15.2 - Use both the sample space (2.4) and the sample...Ch. 15.2 - Given an nonuniform sample space and the...Ch. 15.2 - Two dice are thrown. Given the information that...Ch. 15.2 - Are the following correct nomuniform sample spaces...Ch. 15.2 - Consider the set of all permutations of the...Ch. 15.3 - (a) Set up a sample space for the 5 black and 10...Ch. 15.3 - Prove (3.1) for a nonuniform sample space. Hints:...Ch. 15.3 - What is the probability of getting the sequence...Ch. 15.3 - (a) A weighted coin has probability of 23 of...Ch. 15.3 - What is the probability that a number n,1n99, is...Ch. 15.3 - A card is selected from a shuffled deck. What is...Ch. 15.3 - (a) Note that (3.4) assumes P(A)0 since PA(B) is...Ch. 15.3 - Show that...Ch. 15.3 - Prob. 9PCh. 15.3 - Three typed letters and their envelopes are piled...Ch. 15.3 - In paying a bill by mail, you want to put your...Ch. 15.3 - (a) A loaded die has probabilities...Ch. 15.3 - (a) A candy vending machine is out of order. The...Ch. 15.3 - A basketball player succeeds in making a basket 3...Ch. 15.3 - Use Bayes' formula ( 3.8 ) to repeat these simple...Ch. 15.3 - Suppose you have 3 nickels and 4 dimes in your...Ch. 15.3 - (a) There are 3 red and 5 black balls in one box...Ch. 15.3 - Two cards are drawn at random from a shuffled...Ch. 15.3 - Suppose it is known that 1 of the population have...Ch. 15.3 - Some transistors of two different kinds (call them...Ch. 15.3 - Two people are taking turns tossing a pair of...Ch. 15.3 - Repeat Problem 21 if the players toss a pair of...Ch. 15.3 - A thick coin has 37 probability of falling heads,...Ch. 15.4 - (a) There are 10 chairs in a row and 8 people to...Ch. 15.4 - In the expansion of (a+b)n (see Example 2), let...Ch. 15.4 - A bank allows one person to have only one savings...Ch. 15.4 - Five cards are dealt from a shuffled deck. What is...Ch. 15.4 - A bit (meaning binary digit) is 0 or 1. An ordered...Ch. 15.4 - A so-called 7 -way lamp has three 60 -watt bulbs...Ch. 15.4 - What is the probability that the 2 and 3 of clubs...Ch. 15.4 - Two cards are drawn from a shuffled deck. What is...Ch. 15.4 - Two cards are drawn from a shuffled deck. What is...Ch. 15.4 - What is the probability that you and a friend have...Ch. 15.4 - The following game was being played on a busy...Ch. 15.4 - Consider Problem 10 for different months of birth....Ch. 15.4 - Generalize Example 3 to show that the number of...Ch. 15.4 - (a) Find the probability that in two tosses of a...Ch. 15.4 - Set up the uniform sample spaces for the problem...Ch. 15.4 - Do Problem 15 for 2 particles in 2 boxes. Using...Ch. 15.4 - Find the number of ways of putting 2 particles in...Ch. 15.4 - Find the number of ways of putting 3 particles in...Ch. 15.4 - (a) Following the methods of Examples 3, 4, and 5,...Ch. 15.4 - (a) In Example 5, a mathematical model is...Ch. 15.4 - The following problem arises in quantum mechanics...Ch. 15.4 - Suppose 13 people want to schedule a regular...Ch. 15.4 - Do Problem 22 if one person is busy 3 evenings,...Ch. 15.5 - Set up sample spaces for Problems 1 to 7 and list...Ch. 15.5 - Set up sample spaces for Problems 1 to 7 and list...Ch. 15.5 - Set up sample spaces for Problems 1 to 7 and list...Ch. 15.5 - Set up sample spaces for Problems 1 to 7 and list...Ch. 15.5 - Set up sample spaces for Problems 1 to 7 and list...Ch. 15.5 - Set up sample spaces for Problems 1 to 7 and list...Ch. 15.5 - Set up sample spaces for Problems 1 to 7 and list...Ch. 15.5 - Would you pay $10 per throw of two dice if you...Ch. 15.5 - Prob. 9PCh. 15.5 - Let be the average of the random variable x. Then...Ch. 15.5 - Show that the expected number of heads in a single...Ch. 15.5 - Use Problem 9 to find the expected value of the...Ch. 15.5 - Show that adding a constant K to a random variable...Ch. 15.5 - As in Problem 11, show that the expected number of...Ch. 15.5 - Use Problem 9 to find x in Problem 7.Ch. 15.5 - Show that 2=Ex22. Hint: Write the definition of 2...Ch. 15.5 - Use Problem 16 to find in Problems 2, 6, and 7.Ch. 15.6 - (a) Find the probability density function f(x) for...Ch. 15.6 - It is shown in the kinetic theory of gases that...Ch. 15.6 - A ball is thrown straight up and falls straight...Ch. 15.6 - In Problem 1 we found the probability density...Ch. 15.6 - The probability for a radioactive particle to...Ch. 15.6 - A circular garden bed of radius 1m is to be...Ch. 15.6 - (a) Repeat Problem 6 where the circular area is...Ch. 15.6 - Given that a particle is inside a sphere of radius...Ch. 15.6 - Prob. 9PCh. 15.6 - Do Problem 5.10 for a continuous distribution.Ch. 15.6 - Do Problem 5.13 for a continuous distribution.Ch. 15.6 - Do Problem 5.16 for a continuous distribution.Ch. 15.6 - Prob. 13PCh. 15.6 - Prob. 14PCh. 15.6 - Show that the covariance of two independent (see...Ch. 15.6 - Prob. 16PCh. 15.7 - For the values of n indicated in Problems 1 to 4 :...Ch. 15.7 - For the values of n indicated in Problems 1 to 4:...Ch. 15.7 - For the values of n indicated in Problems 1 to 4:...Ch. 15.7 - For the values of n indicated in Problems 1 to 4:...Ch. 15.7 - Write the formula for the binomial density...Ch. 15.7 - For the given values of n and p in Problems 6 to...Ch. 15.7 - For the given values of n and p in Problems 6 to...Ch. 15.7 - For the given values of n and p in problems 6 to...Ch. 15.7 - Use the second method of Problem 5.11 to show that...Ch. 15.7 - Show that the most probable number of heads in n...Ch. 15.7 - Use the method of Problem 10 to show that for the...Ch. 15.7 - Let x= number of heads in one toss of a coin. What...Ch. 15.7 - Generalize Problem 12 to show that for the general...Ch. 15.8 - Verify that for a random variable x with normal...Ch. 15.8 - Do Problem 6.4 by comparing eax2 with f(x) in...Ch. 15.8 - The probability density function for the x...Ch. 15.8 - Prob. 4PCh. 15.8 - Computer plot on the same axes the normal density...Ch. 15.8 - Do Problem 5 for =16,13,1.Ch. 15.8 - By computer find the value of the normal...Ch. 15.8 - Carry through the following details of a...Ch. 15.8 - Computer plot a graph like Figure 8.3 of the...Ch. 15.8 - Computer plot graphs like Figure 8.2 but with p12...Ch. 15.8 - As in Examples 1 and 2, use (a) the binomial...Ch. 15.8 - As in Examples 1 and 2, use (a) the binomial...Ch. 15.8 - As in Examples 1 and 2, use (a) the binomial...Ch. 15.8 - As in Examples 1 and 2, use (a) the binomial...Ch. 15.8 - As in Examples 1 and 2, use (a) the binomial...Ch. 15.8 - As in Examples 1 and 2, use (a) the binomial...Ch. 15.8 - As in Examples 1 and 2, use (a) the binomial...Ch. 15.8 - As in Examples 1 and 2, use (a) the binomial...Ch. 15.8 - As in Examples 1 and 2, use (a) the binomial...Ch. 15.8 - As in Examples 1 and 2, use (a) the binomial...Ch. 15.8 - As in Examples 1 and 2, use (a) the binomial...Ch. 15.8 - As in Examples 1 and 2, use (a) the binomial...Ch. 15.8 - As in Examples 1 and 2, use (a) the binomial...Ch. 15.8 - As in Examples 1 and 2, use (a) the binomial...Ch. 15.8 - As in Examples 1 and 2, use (a) the binomial...Ch. 15.9 - Solve the sequence of differential equations (9.4)...Ch. 15.9 - Show that the average value of a random variable n...Ch. 15.9 - In an alpha-particle counting experiment the...Ch. 15.9 - Suppose you receive an average of 4 phone calls...Ch. 15.9 - Suppose that you have 5 exams during the 5 days of...Ch. 15.9 - If you receive, on the average, 5 email messages...Ch. 15.9 - In a club with 500 members, what is the...Ch. 15.9 - If there are 100 misprints in a magazine of 40...Ch. 15.9 - If there are, on the average, 7 defects in a new...Ch. 15.9 - Derive equation ( 9.9 ) as follows: In C(n,x),...Ch. 15.9 - Suppose 520 people each have a shuffled deck of...Ch. 15.9 - Computer plot on the same axes graphs of the...Ch. 15.9 - Computer plot on the same axes a graph of the...Ch. 15.10 - Let m1,m2,,mn be a set of measurements, and define...Ch. 15.10 - Let x1,x2,,xn be independent random variables,...Ch. 15.10 - Define s by the equation s2=(1/n)i=1nxix2. Show...Ch. 15.10 - Assuming a normal distribution, find the limits h...Ch. 15.10 - Show that if w=xy or w=x/y, then ( 10.14) gives...Ch. 15.10 - By expanding w(x,y,z) in a three-variable power...Ch. 15.10 - Prob. 7PCh. 15.10 - The following measurements of x and y have been...Ch. 15.10 - Given the measurements...Ch. 15.10 - Given the measurements...Ch. 15.11 - (a) Suppose you have two quarters and a dime in...Ch. 15.11 - (a) Suppose that Martian dice are regular...Ch. 15.11 - There are 3 red and 2 white balls in one box and 4...Ch. 15.11 - If 4 letters are put at random into 4 envelopes,...Ch. 15.11 - Two decks of cards are matched, that is, the order...Ch. 15.11 - Find the number of ways of putting 2 particles in...Ch. 15.11 - Suppose a coin is tossed three times. Let x be a...Ch. 15.11 - (a) A weighted coin has probability 23 of coming...Ch. 15.11 - One box contains one die and another box contains...Ch. 15.11 - Do Problems 10 to 12 using both the binomial...Ch. 15.11 - Do Problems 10 to 12 using both the binomial...Ch. 15.11 - Do Problems 10 to 12 using both the binomial...Ch. 15.11 - A radioactive source emits 1800 particles during...Ch. 15.11 - Suppose a 200-page book has, on the average, one...Ch. 15.11 - In Problems 15 and 16, find the binomial...Ch. 15.11 - In Problems 15 and 16, find the binomial...Ch. 15.11 - Given the measurements...Ch. 15.11 - Given the measurements...
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