On average, the Moon orbits Earth from a distance of about 30 Earth radii
Indicate whether the statement is true or false
FALSE
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If the temperature of an iron sphere is increased
A) its mass will decrease. B) its volume will decrease. C) its density will decrease. D) its density will remain unchanged. E) its density will increase.
A resistor, inductor, and capacitor are connected in series, each with effective (rms) voltage of 65 V, 150 V, and 80 V, respectively. What is the value of the effective (rms) voltage of the applied source in the circuit?
a. 295 V c. 96 V b. 48 V d. 88 V
The sketch above shows groups of stars on the H-R diagram, labeled (a) through (e); note that (a) represents the entire main sequence while (c) and (d) represent only small parts of the main sequence
Which group represents stars that are extremely bright and emit most of their radiation as ultraviolet light? A) a B) b C) c D) d E) e
Vision Problems: A nearsighted person wears contact lenses having a power of -0.15 diopters. What is the person's uncorrected far point?
A. 1.5 m B. 3.3 m C. 6.0 m D. 6.7 m