A common approximation is when the intensity of a sound is doubled, the decibel level increases by 3 . The sound level in a particular location is 100 dB. By what approximate factor is the sound intensity increased if the new decibel level of this sound is 106?
a. 2
b. 3
c. 4
d. 6
c
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Two identical arrows, one with twice the speed of the other are fired into a bale of hay. The faster arrow will penetrate the bale
A) the same distance as the slower arrow. B) twice as far as the slower arrow. C) four times as far as the slower arrow. D) more than four times as far as the slower arrow. E) none of the above
The upper boundary of the region in which the soil is saturated with water is known as the
a. water table. b. aquifer level. c. zone of aeration. d. Moho discontinuity.
Compare the way an optical and radio astronomer would map the Galaxy
What will be an ideal response?
In which of the following cases is the displacement's magnitude half the distance traveled?
a. 10 steps east followed by 3 steps west c. 5 steps east followed by 10 steps west b. 22 steps east followed by 11 steps west d. 15 steps east followed by 5 steps west