A negatively-charged particle moves across a constant uniform magnetic field that is perpendicular to the velocity of the particle. The magnetic force on this particle
A) is in the same direction as the particle's velocity.
B) causes the particle to slow down.
C) causes the particle to speed up.
D) is opposite the direction of the particle's velocity.
E) causes the particle to accelerate.
E
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The imaginary, huge, apparently moving sphere on which the stars appear to be mounted is called the _______________ sphere
a. celestial b. global c. universal d. galactic
A conducting bar of length L rotates in a counterclockwise direction with a constant angular speed of +2.0 rad/s about a pivot P at one end, as shown. A uniform magnetic field (magnitude = 0.20 T) is directed into the paper. If L = 0.40 m, what is the potential difference, VA?VB?
A. +24 mV B. ?24 mV C. +16 mV D. ?16 mV E. +32 mV
Storing____________________ attributes requires constant maintenance.
a) multi-valued b) derived c) single-valued d) composite
When light reflects off an object, what is the relation between the angle of incidence and the angle of reflection?
A) angle of incidence = angle of reflection B) angle of incidence + angle of reflection = 90° C) angle of incidence + angle of reflection = 180° D) angle of incidence - angle of reflection = 90° E) It depends on the material that the light reflects off.