Where does most rainfall on Earth finally end up before becoming rain again?
A) underground
B) in lakes
C) in the oceans
D) on the ground surface
Answer: C
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Volcanism can occur in a mid-ocean rift, above a hot spot in the mantle, or where one tectonic plate slides below another
a. True b. False Indicate whether the statement is true or false
Above what speed do the Relativistic and the Newtonian expressions for KINETIC ENERGY disagree by more than 1%?
What will be an ideal response?
Adding a secondary concave lens of carefully chosen different glass to the primary lens on a refractor allows
A) chromatic aberration to be reduced. B) more light to be gathered. C) greater magnification. D) X-rays to be focused. E) effects of atmospheric turbulence to be reduced.
A pure sample of 226Ra contains 3.0 × 10^14 atoms of the isotope. If the half-life of 226Ra = 1.6 × 10^3 years, what is the activity of this sample?
a. 13 × 10^10 decays/yr c. 6.7 × 10^9 decays/yr b. 9.4 × 10^10 decays/yr d. 8.7 × 10^10 decays/yr