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September 23, 2014

September 23, 2014

Posted by **Sella** on Saturday, August 11, 2012 at 8:08pm.

- algebra -
**Bosnian**, Sunday, August 12, 2012 at 2:30amVr = Vm * ( 1 - r ^ 2 / R ^ 2 )

Vr = ( 1 / 4 ) Vm

( 1 - r ^ 2 / R ^ 2 ) = 1 / 4 Multiply both sides by 4

4 * ( 1 - r ^ 2 / R ^ 2 )= 1

4 - 4 * r ^ 2 / R ^ 2 = 1 Subtract 4 to both sides

4 - 4 * r ^ 2 / R ^ 2 - 4 = 1 - 4

- 4 * r ^ 2 / R ^ 2 = - 3 Multiply both sides by - 1

4 * r ^ 2 / R ^ 2 = 3 Multiply both sides by R ^ 2

4 * r ^ 2 = 3 * R ^ 2 Divide both sides by 4

r ^ 2 = 3 R ^ 2 / 4

r = sqrt ( 3 R ^ 2 / 4 )

r = sqrt ( 3 ) * R / 2

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