The rate of flow of electric charge is __________
Fill in the blank(s) with correct word
current
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Which of the following frequencies could NOT be present as a standing wave in a 2-m-long organ pipe open at both ends? The fundamental frequency is 85 Hz.
A. 85 Hz. B. 170 Hz. C. 255 Hz. D. 340 Hz. E. 382 Hz.
Two identical sound producers will sound twice as loud as just one
Indicate whether the statement is true or false
Sound traveling in air at 23
enters a cold front where the air temperature is 2
If the frequency of the sound is 1500 Hz, what is the difference in the wavelength between the cold air and the warm air?
A. 0.009 m B. 0.019 m C. 0.067 m D. 0.058 m
A person with normal eyesight uses a converging lens of focal length 10 cm. He holds the lens close to his eyes to finish an engraving job. What is the magnifying power of the lens?
A) 3.5 B) 4.5 C) 6.5 D) 7.5 E) 8.5