When a wave is ______________, the angle of reflection equals the angle of incidence
Fill in the blank(s) with correct word
reflected
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Muscular strength has to do with __________
Fill in the blank(s) with the appropriate word.
A tube open at one end and closed at the other end produces sound having a fundamental frequency of 350 Hz. If you now open the closed end, the fundamental frequency becomes
A) 87.5 Hz. B) 175 Hz. C) 350 Hz. D) 700 Hz. E) 1400 Hz.
Tasha has mass 20 kg and wants to use a 6.0-m board of mass 10 kg as a seesaw. Her friends are busy, so Tasha seesaws by herself by putting the support at the system's center of gravity when she sits on one end of the board. How far is she from the support point?
a. 2.0 m c. 0.67 m b. 1.0 m d. 0.33 m
To transmit four times as much energy per unit time along a string, you can
a. double the frequency. b. double the amplitude. c. increase the tension by a factor of 16. d. do any one of the above. e. do only (a) or (b) above.