Momentum: A tiger is running in a straight line. If we double both the mass and speed of the tiger, the magnitude of its momentum will increase by what factor?
A. 
B. 2
C. 4
D. 8
E. 16
Answer: C
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The mean life (time constant) of radon-222 is 5.526 d. If a sample of radon initially contains 6.00 × 108 radon atoms, how many of them are left after 10.0 d?
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The temperature of a gas can be increased by
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