If a fossil bone is found to contain 1/32 as much Carbon-14 as the bone of a living animal, what is the approximate age of the fossil? (half-life of 14C = 5 730 years)
a. 1.83E+5 years
b. 2.87E+4 years
c. 1.15E+3 years
d. 5.55E+3 years
e. 1.79E+2 years
b
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Two identical balls are at rest side by side at the bottom of a hill. Some time after ball A is kicked up the hill, ball B is given a kick up the hill. Ball A is headed downhill when it passes ball B headed up the hill. At the instant when ball A passes ball B,
A. it has the same position and velocity as ball B. B. it has the same position and acceleration as ball B. C. it has the same velocity and acceleration as ball B. D. it has the same displacement and velocity as ball B. E. it has the same position, displacement and velocity as ball B.
How it is that Insull's apartment building allows more efficiency in the distribution and supply system?
What will be an ideal response?
For a furnace to provide 50,000 Btu/hr of thermal energy to a living space, what should the rate of heat supplied by the fuel if the furnace efficiency is 75%?
a. 25,000 b. 37,000 c. 50,000 d. 67,000 e. 125,000 Btu/hr
A heavy ball hangs by a string, with a second string attached to its bottom (Figure 4.8 in your book). A quick pull on the bottom string breaks the
A) top string. B) bottom string. C) top or bottom string equally.