E = kRD^2
So,
(32/25)=(8*5^2)k
E = 4/625 RD^2
Now use your values to find the desired R.
given that the energy E,varies directly as the resistance R,as the square of the distance D, obtain an equation connecting E,R and D.E=32/25 when R=8 and D=5 calculate the value of R when E=16 and D=5
2 answers
E =kRD^2. So(32/25)=(8*√5)K crossmultiply =32 /25=8k/25. 800=200k. Divide both sides by 200. 800/200=200/200k. K=4. Calculate value of R when E=16,d=3,k=4. 16×4×R/√3.cross multiply. 4r=16×9. 4r=144. Divide both sides by 4. 4r/4=144/4. R=35
1 answer