Suppose you live at latitude 40ºN. Which of the following describes the path of the celestial equator through your sky?
A) It extends from due east on your horizon, to an altitude of 50º in the south, to due west on your horizon.
B) It extends from due south on your horizon, to your zenith, to due north on your horizon.
C) It extends from due east on your horizon, to an altitude of 40º in the south, to due west on your horizon.
D) It extends from due east on your horizon, to an altitude of 40º in the north, to due west on your horizon.
A) It extends from due east on your horizon, to an altitude of 50º in the south, to due west on your horizon.
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An optical SETI signal would most likely consist of
A) using mirrors to reflect light from the surface of a planet B) using a giant disk to block out the light from the parent star C) rapid, short bursts of intense laser light D) a continuous beam of laser light
When two elements come together to form a compound, which element is named first within the name of the compound?
A) The element coming first in the English alphabet. B) The element with the greater atomic mass. C) The element with the greater atomic number. D) The element toward the left hand side of the periodic table.
If 20.0 g of compound XY decomposes to form 12.0 g of element X and 8.00 g of element Y, ______________ g of element X will be formed by the decomposition of 40.0 g of compound XY
Fill in the blank(s) with correct word
If you filter sea water to remove all of the particles you would be left with a clear
A) homogeneous mixture called a solution. B) homogeneous mixture called a suspension. C) heterogeneous mixture called a solution. D) heterogeneous mixture called a suspension. E) pure liquid.