A 1.50-m long gas column that is open at one end and closed at the other has a fundamental resonant frequency 80.0 Hz. What is the sound speed in this gas?
A)
120 m/s
B)
53.3 m/s
C)
30.0 m/s
D)
213 m/s
E)
480 m/s
E
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A. 2 years younger B. 2 years older C. 3 years older D. 10 years older E. 8 years older
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How many downward atomic transitions per second must occur in the laser if all of them result in light directed onto the diamond? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s) A) 8.9 × 1019 B) 8.9 × 1018 C) 5.9 × 1019 D) 2.7 × 1018
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