Light from Proxima Centauri takes 4.2 years to reach Earth
Indicate whether the statement is true or false
True
Physics & Space Science
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In the activity series, Zn is more active than Pb. This means that
a. Zn is a better catalyst than Pb. b. Zn loses its electrons more easily than Pb. c. Pb is more readily oxidized than Zn. d. none of these
Physics & Space Science
The center of our galaxy lies in the direction of the constellation of
a. Ursa Minor. b. Ursa Major. c. Sagittarius. d. Orion. e. Monoceros.
Physics & Space Science
A 180-hp engine can deliver, in SI units, an average power of ____. (1 hp = 746 W)
a. 2.4E–1 W b. 4.1E+3 W c. 1.3E+5 W d. 1.8E+2 W e. 9.3E+2 W
Physics & Space Science
__________is a unit of distance equal to the distance light travels in 1 year
A) The astronomical year B) The light-year C) A light parsec D) A light meter
Physics & Space Science