All waves have in common a
A) pattern.
B) vibrating source.
C) variable regions of high and low pressure.
D) none of the above
Answer: B
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What did the Wilkinson Microwave Anisotropy Probe (WMAP) measure?
a) differences in the temperature of radiation coming from the Big Bang from different directions b) the existence of a particle emitted through negative gravity c) the epoch of the formation of the first stars d) the existence of low mass dark matter particles e) the presence of supermassive black holes in the centers of nearly all galaxies
As the angle of incidence is decreased for a ray incident on a reflecting surface, the angle between the incident and reflected rays ultimately approaches what value?
a. 90° c. 45° b. 180° d. zero
A series LC circuit contains a 100-mH inductor, a 36.0-mF capacitor and a 12-V battery. The angular frequency of the electromagnetic oscillations in the circuit is
A. 36.0 × 10?4 rad/s. B. 6.00 × 10?2 rad/s. C. 2.78 rad/s. D. 16.7 rad/s. E. 277 rad/s.
Which of the following best describes what would happen if a 1.5 solar mass neutron star, with a diameter of a few kilometers, were suddenly to appear in your hometown?
A) It would rapidly sink to the center of the Earth. B) It would crash into the Earth, throwing vast amounts of dust into the atmosphere which in turn would cool the Earth. Such a scenario is probably what caused the extinction of the dinosaurs. C) The combined mass of the Earth and the neutron star would cause the neutron star to collapse into a black hole. D) The entire mass of the Earth would end up as a thin layer, about 1 cm thick, over the surface of the neutron star. E) It would crash through the Earth, creating a large crater, and exit the Earth on the other side.