If one of the intrinsically brightest stars in our sky were 10pc away from Earth, it would appear:
A) more than 10 times as bright as Earth at its brightest.
B) more than 25 times as bright as Venus at its brightest.
C) more than 10 times as bright as Venus at its brightest.
D) more than 25 times as bright as Earth at its brightest.
B
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The study of the behavior of atoms and atomic particles is referred to as:
A) quantum mechanics. B) thermodynamics. C) the electromagnetic theory. D) theory of computations.
Consider a compass with a square magnet placed in a uniform electric field, as shown below. Supposing that we place the square-magnet compass in a rightward magnetic field 
instead of a rightward electric field 
.
A. Clockwise, to align itself with the field. B. Counter clockwise, to align itself with the field. C. 180° either clockwise or counter clockwise. D. It won’t turn, as it is already aligned with the field. E. It won’t turn, because the field wants to twist it around a different axis altogether. F. It won’t turn because it is not affected by this field.
Suppose that Earth's ice caps melted, but everything else about the Earth's surface and atmosphere stayed the same. What would happen to Earth's average surface temperature?
A) The temperature would not be affected at all. B) The surface temperature would decrease. C) The surface temperature would increase. D) The surface temperature would change radically, until it was equal to the melting temperature of ice.
What is the voltage across a 5.0-? resistor if the current through it is 5.0 A?
A) 100 V B) 25 V C) 4.0 V D) 1.0 V