Physics, 17.04.2021 16:30 seaans20391
How can different EM signals (like radio broadcasts and cell phone conversations) take place without intererring with each other?
1) radios and cellphones r tuned to only detect em waves of the proper frequency
2) em waves of different wavelengths never interfere with on another
3) radio broadcasts r sent at ground level while cellphone signals r sent to space
4) the interference only happens for a fraction of a second. most of the time theyre not interferring
Answers: 2
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An electron moves with a constant horizontal velocity of 3.0 × 106 m/s and no initial vertical velocity as it enters a deflector inside a tv tube. the electron strikes the screen after traveling 26 cm horizontally and 19 cm vertically upward with no horizontal acceleration. what is the constant vertical acceleration provided by the deflector? (the effects of gravity can be ignored.)
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