In a swell, wavelength is constant. As a swell touches bottom, the wavelength
A) increases and velocity decreases.
B) shortens and velocity decreases.
C) shortens and velocity increases.
D) and velocity increase.
Answer: B
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A battery stores electric charge in the same way that a bottle stores water
a. True b. False Indicate whether the statement is true or false
Protons are being accelerated in a particle accelerator. When the energy of the protons is doubled, their de Broglie wavelength will
A) increase by a factor of 4. B) increase by a factor of 2. C) decrease by a factor of 2. D) increase by a factor of . E) decrease by a factor of .
A piano wire of length 1.5 m vibrates so that one-half wavelength is contained on the string. If the frequency of vibration is 65 Hz, the amplitude of vibration is 3.0 mm, and the density is 15 g/m, how much energy is transmitted per second down the wire?
a. 21 W b. 11 W c. 5.4 W d. 2.2 W e. 1.1 W
A string with a mass per length of 2.00 g/m is stretched between two points that are 0.400 m apart. The second mode frequency of the stretched string is 50.0 Hz lower than the third mode frequency. What is the tension in the string?
A. 400 N B. 375 N C. 321 N D. 281 N E. 250 N