A rock is thrown straight up with an initial velocity of 30.0 m/s.What maximum height will the rock reach before starting to fall downward? (Acceleration due to gravity is 9.80 m/s2.)

a. 9.80 m
c. 20.4 m
b. 19.6 m
d. 45.9 m

Physics & Space Science

If the color spectrum ranges from red to violet, then it ranges from

A) low frequencies to high frequencies. B) long wavelengths to short wavelengths. C) both of these D) neither of these

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Physics & Space Science

During an isobaric process which one of the following does not change?

a. volume b. temperature c. internal energy d. pressure

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Physics & Space Science

A sound source of 100 watts radiates sound uniformly in all directions. The intensity of the sound at a distance of 4.00 m is

A. 0.301
B. 0.353
C. 0.497
D. 0.535
E. 0.621

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Physics & Space Science

Which of the following is a threat to the ozone layer?

A) coal burning B) freon refrigerants C) Both of the above. D) automobile exhaust E) None of the above.

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Physics & Space Science