The angle between the string of a pendulum and its equilibrium position and at its maximum displacement is the pendulum's
a. frequency
b. velocity
c. amplitude
Ans: c. amplitude
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In a diagram of electric field lines, q1 has 9 lines going into it and q2 has 27 lines going out of it. If one of the charges is -40 mC, which of the following could be the other one?
A. -120 mC B. 18.0 mC C. -18.0 mC D. 120 mC E. none of the these choices are correct
Which space observatory uses the transit method to detect extrasolar planets?
a. Hubble b. Kepler c. Spitzer d. Chandra e. Voyager
A Type II supernova produces a planetary nebula
a. True b. False Indicate whether the statement is true or false
The cause of the pulsations we see in the light from neutron stars is
A) the in and out pulsations of star's radius, as the star gets rapidly larger and then smaller. B) pulsations of its neutrons. C) the spinning motion of the star. D) motions of electrons within the star. E) Nonsense--neutron stars do not pulsate.