Bok globules are small, dark fragments of the interstellar medium
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Energy Conservation With Conservative Forces: Assuming negligible friction, what spring constant (force constant) would be needed by the spring in a "B-B gun" to fire a 10-g pellet to a height of 100 m if the spring is initially compressed by 0.10 m?
A. 20 N/cm B. 20 N/m C. 200 N/m D. 2000 N/cm E. 0.0020 N/m
Triton's retrograde orbit is consistent with it having
A) been spun out from a rapidly rotating Neptune B) been captured by Neptune's gravity C) undergone a massive impact D) formed from a rotating disk of gas and dust around Neptune
An acoustical engineer designing a music hall is most concerned with
A) modulation. B) forced vibrations. C) resonance. D) beats. E) reverberations.
Two uses of ultrasound are navigation by bats and controlling insects
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