A string is strung horizontally with a fixed tension. A wave of frequency 60.0 Hz is sent along the string, and it has a wave speed of 58.4 m/s. Then a second wave, one of frequency 120 Hz, is sent along the string. What is the wave speed of the second wave?
a. 29.2 m/s
b. 58.4 m/s
c. 117 m/s
d. 87.6 m/s
e. 234 m/s
b
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You are somewhere in the solar system. You can see Jupiter high in the sky, and it looks enormous. You can also see numerous nearby volcanoes, some that are currently erupting. Where are you?
A) Mars B) Venus C) Europa D) Io
Doubling the momentum of
a. a particle doubles its relativistic total energy. b. a particle quadruples its relativistic total energy. c. a photon doubles its relativistic total energy. d. a photon quadruples its relativistic total energy.
Which of the following is not used as a distance indicator for galaxies?
a. Large globular clusters b. Herbig-Haro objects c. H II regions d. Cepheid variable stars e. Supernovae
Potential Energy: A small 4.0-µC charge and a small 1.5-µC charge are initially very far apart. How much work does it take to bring them to a final configuration in which the 4.0-µC charge is at the point x = 1.0 mm, y = 1.0 mm, and the 1.5-µC charge is at the point x = 1.0 mm, y = 3.0 mm? (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
A. 27 J B. 13.5 kJ C. 54 J D. 13.5 J