In terms of its thick and chemically active atmosphere of hydrocarbons, which jovian moon was visited by the Huygens probe in 2005?
A) Europa
B) Triton
C) Titan
D) Titania
E) Enceladus
C
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What is a CCD?
A) It is an electronic detector that can be used in place of photographic film for making images. B) It is an abbreviation for the world's largest operating telescope. C) It refers to any kind of instrument that can be hooked up to a telescope. D) It is a unit used by astronomers to measure angular resolution.
A heater is rated at 1200 watts for a 120-volt source.The resistance in ohms of the heater is
a. 0.1 b. 10. c. 144,000 d. none of the above.
Which one of the following quantities is equivalent to 1 W?
A) 1 ? ? m B) 1 V ? A C) 1 V/A D) 1 V/? E) 1 A ? s
A temperature difference of 10 Celsius degrees is also equal to a temperature difference of
10 on the A) Fahrenheit scale. B) Kelvin scale. C) both of these D) neither of these