Star A is identical to Star B, except that Star A is twice as far from us as Star B. Therefore, ________
A) both stars have the same luminosity, but the apparent brightness of Star A is four times that of
B) both stars have the same luminosity, but the apparent brightness of Star B is four times that of
C) both stars have the same apparent brightness, but the luminosity of Star B is four times that of
D) both stars have the same luminosity, but the apparent brightness of Star B is twice that of Star A
B
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In Robert Frost's classic poem, when he ends with "ice will suffice," the universe is:
A) closed. B) critical density. C) open. D) Euclidean. E) Relativistic.
Which of the following is NOT true about the RGB color system?
A. The system combines the red, green, and blue light channels. B. The intensity level of each light channel is measured in values. C. The values range from 0 to 360. D. To ensure exact color specifications, use different values from the channels.
The buoyant force acting on a 10-ton ship floating in the ocean is
A) less than 10 tons. B) 10 tons. C) more than 10 tons. D) depends on density of sea water
An object is placed 60 cm from a convex lens of focal length 10 cm. What is the magnification?
A) -0.10 B) 0.10 C) 0.15 D) 0.20 E) -0.20