Stream velocity is faster in a
A) flat bottomed, shallow stream channel.
B) rounded, relatively deep stream channel.
C) stream with a very steep gradient.
D) canyon.
Answer: C
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Self-Inductance: The figure shows a solenoid having no appreciable resistance. When the current in this solenoid is decreasing at a rate of 5.5 A/s, the self-induced emf in the solenoid is measured to be 9.5 V.(a) What is the self-inductance of this solenoid?(b) If the current is in the direction from b to a in the figure, which point, a or b, is at higher potential?
What will be an ideal response?
An object that completes 100 vibrations in 5 seconds has a period of
A) 0.5 second. B) 1 second. C) 2 seconds. D) none of the above
Use of a parabolic mirror, instead of one made of a circular arc surface, can be used to reduce the occurrence of which of the following effects?
a. mirages c. chromatic aberration b. spherical aberration d. light scattering
The meaning of the phrase "space is relative" is that
A) all observers measure the same speed for a lightbeam. B) two observers, both in the same reference frame, observe different lengths for different objects. C) two observers, in different reference frames, observe different lengths for different objects. D) two observers, in different reference frames, observe different lengths for the same object. E) two observers, both in the same reference frame, observe different lengths for the same object.