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Physics P42 answers

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>i don't remember the value but it's Q1Q2/4πε0GM1M2.
>equal pressure. Calculate using pV1=n1RT1 and pV2=n2RT2. I think n=0.72.
>from the graph Capacitance = gradient = dQ/dV.
>for the next one i calculated the total capacitance and then the total charge and X= total charge. i'm not sure if it's correct.
>For I=9.9sin(380t), compare it with I=Iosinwt.
>E=mc2 gives the energy equivalent to 1u.
>for experiment to show electron behaving as wave, say electron beam directed through graphite film gives "INTERFERENCE" pattern on the fluroscent screen. Also relate it with λ=h/p.
>for the graph of the one with magnet, draw graph similar to that of "RESONANCE". Resonance occurs. I'm not sure about this.
>I coudn't solve the one with op amp. it freaked me out.
>question on attenuation is similar to the one in the application booklet. lenght= 70.5 Km.

Good Luck with all the exams. :D
 
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