Consider a sphere with a positive charge uniformly distributed on its surface. The sphere spins clockwise around the z axis. The magnetic field this sphere creates is
A. unidirectional.
B. circular.
C. radial.
D. None of the above.
D. None of the above.
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Which of the following paraphrases Hubble's Law?
A) The faster the galaxy spins, the more massive and luminous it is. B) The greater the distance to a galaxy, the greater its redshift. C) The greater the distance to a galaxy, the fainter it is. D) The more distant a galaxy is, the younger it appears. E) The older the galaxy appears to us, the more luminous it is.
A hockey puck traveling at speed v on essentially frictionless ice collides elastically with one end of a straight stick lying flat on the ice. In this collision
A. momentum is conserved. B. angular momentum is conserved. C. energy is conserved. D. all of the above are conserved. E. only momentum and angular momentum are conserved.
A ray of light is incident on the mid-point of a glass prism surface at an angle of 24.0° with the normal. For the glass, n = 1.55, and the prism apex angle is 44.3°. What is the angle of refraction as the ray enters the air on the far side of the prism?
a. 0.853° b. 48.9° c. 18.3° d. 11.7° e. 29.1°
It takes 4.00 minutes to fill a gas tank with 50.0 liters of gasoline. If the pump nozzle is 1.35 cm in radius, what is the average speed of the gasoline as it leaves the nozzle? (1 000 liters = one cubic meter)
a. 3.64 m/s b. 0.364 m/s c. 21.8 m/s d. 1.36 m/s e. 12.5 m/s