A standing wave is set up in a string of variable length and tension by a vibrator of variable frequency. Both ends of the string are fixed. When the vibrator has a frequency f , in a string of length L and under tension T , n antinodes are set up in the string. (a) If the length of the string is doubled, by what factor should the frequency be changed so that the same number of antinodes is produced? (b) If the frequency and length are held constant, what tension will produce n + 1 antinodes? (c) If the frequency is tripled and the length of the string is halved, by what factor should the tension he changed so that twice as many antinodes are produced?
A standing wave is set up in a string of variable length and tension by a vibrator of variable frequency. Both ends of the string are fixed. When the vibrator has a frequency f , in a string of length L and under tension T , n antinodes are set up in the string. (a) If the length of the string is doubled, by what factor should the frequency be changed so that the same number of antinodes is produced? (b) If the frequency and length are held constant, what tension will produce n + 1 antinodes? (c) If the frequency is tripled and the length of the string is halved, by what factor should the tension he changed so that twice as many antinodes are produced?
Solution Summary: The author explains that the frequency of the vibrator should be changed by a factor of 12 so that same number of 'antinodes' are produced.
A standing wave is set up in a string of variable length and tension by a vibrator of variable frequency. Both ends of the string are fixed. When the vibrator has a frequency f, in a string of length L and under tension T, n antinodes are set up in the string. (a) If the length of the string is doubled, by what factor should the frequency be changed so that the same number of antinodes is produced? (b) If the frequency and length are held constant, what tension will produce n + 1 antinodes? (c) If the frequency is tripled and the length of the string is halved, by what factor should the tension he changed so that twice as many antinodes are produced?
In general it is best to conceptualize vectors as arrows in
space, and then to make calculations with them using
their components. (You must first specify a coordinate
system in order to find the components of each arrow.)
This problem gives you some practice with the
components.
Let vectors A = (1,0, -3), B = (-2, 5, 1), and
C = (3,1,1). Calculate the following, and express your
answers as ordered triplets of values separated by
commas.
Chapter 18 Solutions
Physics for Scientists and Engineers, Volume 1, Chapters 1-22
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