Are cosmic rays a form of light?
A) No, they consist of high-energy subatomic particles, not of electromagnetic waves.
B) Yes, they are light waves with higher energy than gamma rays.
C) Yes, they are light waves with lower energy than radio waves.
D) Yes, they are the name we give to all rays of light that come from the cosmos.
A) No, they consist of high-energy subatomic particles, not of electromagnetic waves.
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What color does the planet Mars appear to the naked eye in the sky?
A) yellow B) white C) blue D) red
A particle (charge = 40 mC) moves directly toward a second particle (charge = 80 mC) which is held in a fixed position. At an instant when the distance between the two particles is 2.0 m, the kinetic energy of the moving particle is 16 J. Determine the distance separating the two particles when the moving particle is momentarily stopped
a. 0.75 m b. 0.84 m c. 0.95 m d. 0.68 m e. 0.56 m
A charge +3q is placed at x = 0 and a charge +11q is placed at x = 5 units. Where, along the x-axis is the net force on a charge Q equal to zero?
A) x = 1.72 units B) x = 0.48 units C) x = 0.27 units D) x = 0.21 units E) x = 0.52 units
Recent work with type I supernovae at great distances suggests the universe may in fact be accelerating its expansion, a discovery attributed to a newly found:
A) repulsive charge on dark matter. B) polarization and a universal spinning magnetic field. C) dark energy. D) magnetic field associated with antimatter. E) mass determined for the neutrinos.