Two sound waves of the same frequency and amplitude are broadcast from speakers at opposite ends of a theater. in the middle of the theater, you hear a sound 6 db louder than that from either speaker. which of the following is true?
a) the two waves are in phase in the middle of the theater.
b) the two waves are 180° out of phase in the middle of the theater.
c) the two waves are 90° out of phase in the middle of the theater.
d) the two waves are 45° out of phase in the middle of the theater.
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Ответ:
Ответ:
The waves are in sync with each other. I just took the test, this is the right answer.
Ответ:
What was one of the reasons that Anti-Federalists were opposed to the Constitution?
A) They felt the Constitution gave too much power to the individual states.
B) They worried that the new government would be too much like England's government.
C) They wanted the national government to have the power to tax the states.
D) They did not want the Constitution to include a Bill of Rights.