GIVING OUT 100POINTS !!! PLS HELP ME WITH THESE QUESTIONS
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Kepler's first law means that planets move around the Sun in elliptical orbits. An ellipse is a shape that resembles a flattened circle. ... Read more about planetary orbit.
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in the first one we have the resistors connected in series and then connected in parallel
there fore Rs=R1+R2 =100Ω+xΩ
and 25Ω+75Ω=100Ω
now they are connected in parallel
therefore \frac{1}{R1}
R1
1
+\frac{1}{R2}
R2
1
= 1/100 + 1/100+x = 1/20
after calculation x= 75Ω
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