A saber-toothed-tiger's bones contain 1/32 of the amount of 14C that is contained in the bone material of living animals. The half-life of 14C is 6000 years. From this information, we can conclude
A) that the tiger died about [i.e., plus or minus a few thousand years] 42,000 years ago.
B) nothing at all, because 14C dating is known to be inaccurate.
C) nothing at all, because of the uncertainties associated with radioactive decay.
D) that the tiger died about 18,000 years ago.
E) that the tiger died about 30,000 years ago.
E
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A dinner plate falls vertically to the floor and breaks up into three pieces, which slide horizontally along the floor
Immediately after the impact, a 200-g piece moves along the +x-axis with a speed of 2.00 m/s, a 235-g piece moves along the +y-axis with a speed of 1.50 m/s. The third piece has a mass of 100 g. What is the speed of the third piece? A) 3.50 m/s B) 6.83 m/s C) 5.33 m/s D) 2.57 m/s E) 2.51 m/s
Galileo wrote the Almagest
a. True b. False Indicate whether the statement is true or false
The motion of atoms and molecules that most affects temperature is
A) translational. B) rotational. C) vibrational. D) none of the above
Luminosity has units of energy per time. Apparent brightness has units of energy per time per area. Which of the following expressions correctly states the relationship between luminosity, distance, and apparent brightness (known as the "inverse square law for light")?
A) luminosity = B) apparent brightness = C) apparent brightness = luminosity × 4? × (distance)2 D) distance =