The figure shows the Sun and pairs of sunspots. One could say that there is really a 22-year sunspot cycle because
B
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The figure is a graph of an object moving in a straight line. Solve graphically to determine which section of the path has the highest speed.
A. DE
B. EF
C. CD
D. AB
Coil 1, connected to a 100-? resistor, sits inside coil 2. Coil 1 is connected to a source of 60 cycle per second AC current. Which statement about coil 2 is correct?
A. No current will be induced in coil 2. B. DC current (current flow in only one direction) will be induced in coil 2. C. AC current (current flow in alternating directions) will be induced in coil 2. D. DC current will be induced in coil 2, but its direction will depend on the initial direction of flow of current in coil 1. E. Both AC and DC current will be induced in coil 2.
Which of the following studies is best suited to a time monitoring experiment?
A) studying how different stars differ in their chemical compositions B) studying whether a particular star's brightness is steady or variable C) determining the age of the solar system D) measuring the rotation rate of a distant star E) estimating the time since the Big Bang
Find Brewster's angle for light in air that is reflected from the top of a water surface. The index of refraction of the water is 1.33
A) 53.1° B) 36.9° C) 56.3° D) 60.2° E) 90.0°