Country X's population is doubling every 10 years. What is its rate of population growth?
A) It is impossible to answer this without knowing country X's population.
B) 2% per year
C) 7% per year
D) 10% per year
E) 14% per year
C
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An observer in the Northern Hemisphere watches the sky for several hours. Due to the motion of Earth, this observer notices that the stars near the north celestial pole appear to move
a. counter clockwise around the celestial pole. b. clockwise around the celestial pole. c. from left to right. d. from right to left. e. nearly vertically upward.
Of these properties of waves, which one is independent of the others?
A. amplitude B. speed C. frequency D. wavelength
When dark matter was first discovered, some astronomers thought that ?o was greater than one from the extra gravity, favoring what type of universe?
What will be an ideal response?
Venus and Mercury both have magnetic fields similar to Earth's
Indicate whether the statement is true or false