Hubble's Law is only effective in measuring the distance to nearby galaxies
a. True
b. False
Indicate whether the statement is true or false
False
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Why can studies of carbon isotopes be used to detect the presence of past biological activity in rocks?
A) living organisms absorb only the most common carbon isotope B) living organisms remove all carbon from rocks C) living organisms absorb certain carbon isotopes more easily than others D) carbon isotopes are found only in living organisms
Charges q, q, and –q are placed on the x-axis at x = 0, x = 4 m, and x = 6 m, respectively. At which of the following points does the electric field have the greatest magnitude?
a. x = 3 m b. x = 5 m c. x = 8 m d. The electric field has the same magnitude at all three positions. e. x = 7 m
The lowest possible temperature a body can approach is called
A. absolute zero. B. "mighty" cold. C. critical temperature. D. triple absolute zero. E. triple point.
Which emits radiation of the highest frequency?
A) a red-hot star B) the Sun C) a blue-hot star D) all the same