A sound source of 150 watts radiates sound uniformly in all directions. The intensity of the sound at a distance of 4.00 m is
A. 0.389 
B. 0.403
C. 0.582
D. 0.746
E. 0.927
D. 0.746
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For experiments involving the setup shown in figure Q4.1b, which of the following possible results (if seen) regarding the final value displayed by the voltmeter would probably not be consistent with the wave model of light? 
A. It increases as the light’s intensity increases. B. It is independent of the light’s intensity. C. It varies as the light’s wavelength changes. D. It increases as the rate of electron ejection increases.
A major process in modifying Earth's crust is erosion by wind
a. True b. False Indicate whether the statement is true or false
At the end of the Paleozoic era, all
A) dinosaurs became extinct. B) flowering plants grew to great heights. C) fish species became extinct. D) trilobites became extinct.
You observe a full Moon rising at sunset. What will you see at midnight?
A) a full moon high in the sky B) a first-quarter moon C) a waning gibbous moon D) a third-quarter moon