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Chapter 16: Q. 1 (page 451)
The wave speed on a string under tension is 200 m/s. What is the speed if the tension is halved?
The new speed of the wave is 141.4 m/s
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Figure Q16.3 is a history graph showing the displacement as a function of time at one point on a string. Did the displacement at this point reach its maximum of 2 mm before or after the interval of time when the displacement was a constant 1 mm?
Rank in order, from largest to smallest, the wavelengths for sound waves having frequencies . Explain.
A sinusoidal wave travels along a stretched string. A particle on the string has a maximum speed of 2.0 m/s and a maximum acceleration of 200 m/s2. What are the frequency and amplitude of the wave?
The intensity of electromagnetic waves from the sun is 1.4 kW/m2 just above the earth鈥檚 atmosphere. Eighty percent of this reaches the surface at noon on a clear summer day. Suppose you think of your back as a 30 cm * 50 cm rectangle. How many joules of solar energy fall on your back as you work on your tan for 1.0 h?
Show that the displacement , where c and d are constants, is a solution to the wave equation. Then find an expression in terms of c and d for the wave speed.
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