The three colors that comprise the image on a TV screen are
A) red, blue, and yellow.
B) red, blue, and green.
C) yellow, blue, and green.
D) magenta, cyan, and yellow.
E) red, green, and yellow.
Answer: B
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Which of the following is the largest object?
a. The Milky Way galaxy. b. The Large Magellanic Cloud. c. The Local Group. d. The Andromeda galaxy.
Which layer of the Sun do we see with our eyes?
A) photosphere B) corona C) chromosphere D) convection zone E) radiation zone
According to Kepler's laws, Halley's Comet circles the Sun in an elliptical path with the Sun at one focus of the ellipse. What is it that Kepler's laws indicate is at the other focus of the ellipse?
a. nothing b. the Earth c. The comet itself passes through the other focus. d. The tail of the comet stays at the other focus.
A watt is equal to
a. 746 horsepower b. one calorie c. one joule d. 1 J/s e. a unit of energy