A 6.00-m length of rope has a mass of 700 g. It is pulled taught with a force of 100 N. What is the speed of waves on the rope?
A) 29.3 m/s
B) 11.7 m/s
C) 42.0 m/s
D) 3.42 m/s
E) 4.20 m/s
A
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Spectra are often represented as graphs of:
A) distance versus luminosity. B) temperature versus density. C) intensity versus wavelength. D) brightness versus darkness.
Comparing the following 4 models, which model predicts that galaxies had the largest separations in the past? (Use the graph of expansion models as a guide.)
A) accelerating B) coasting C) critical D) recollapsing
The electrical power dissipated by a resistance R is
a. inversely proportional to I. b. directly proportional to I2. c. directly proportional to I. d. none of these.
A tuning fork with a frequency of 512 Hz is used to tune a violin. When played together, beats are heard with a frequency of 4 Hz. The string on the violin is tightened and when played again, the beats have a frequency of 2 Hz. The original frequency of the violin was
A. 510 Hz. B. 514 Hz. C. 516 Hz. D. 508 Hz.