Member since February 14, 2017

henry9595

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henry9595
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Science, Photoelectric Effect, Sound Level, Db, Threshold, Homework, Wave Motion, Problem
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Tue 14 Feb, 2017 07:24 am - an amplifier of a home cinemas equipment can achieve a sound level of 100 dB. how many of these amplifier is needed to exceed threshold where the equipment is found? (view)
Tue 14 Feb, 2017 07:14 am - A light with a wavelength if 510 nm, is just able to eject electrons from a metal. Find a. Work function. b.what will the speed of the fastest electron be ,if the used wavelength is 380 nm? (view)
 
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