What is the threshold of hearing?
A) 0.1 decibel
B) 0.01 decibel
C) 1 decibel
D) 10 decibel
E) none of the above
Answer: E
You might also like to view...
When air drag affects the motion of projectiles, they don't travel
A) as high. B) as far. C) both of these D) neither of these
A rainbow shows separate colors of the spectrum because, at raindrop surfaces,
A. blue light is bent more than red light. B. all colors are bent the same, hence the separation. C. green light is bent more than blue light. D. red light is bent more than green light.
As hot mantle rock rises, it expands. As it expands it cools. This cooler rock is
A) less dense so it keeps rising to form underwater volcanoes. B) more dense so it sinks. This contributes to the heat flow convection process. C) ocean crust. D) unstable and explodes in a volcano.
Mean Life: 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?
A. 9.82 × 107 B. 7.67 × 107 C. 8.34 × 108 D. 7.29 × 108 E. 8.56 × 108