Question

3.46-12 Section 25.2 Its when 7 drops each of radius R 3.00 mm merge? each

Answer 1

Let r' be the radius of bigger cdrop now, volume of bigger drop = 7 times volume of summer drops 4/3 pi (r')^3 = 7 times 4/3 pi r^3 (r')^3 = 7 times r^3 r'= 3 squareroot 7 times r {r = 3.00 mm} = 3 squareroot 7 times 3 times 10 ^-3 m = 1.9129 times 3 times 10 ^-3 m r'= 5.7387 times 10^-3 now we know that an is plated changed sphere has capacitance. C = 4 pi epsilon _0 r' { 4 pi epsilon _0 = 1/ 9 times 10^9 } c = r' division 9 times 10^9 c = 5.7387 times 10^-3 times 1 = 0.6376 times 10^-12 f 9 times 10^9 c = 0.64 p f { 1f = 10^-12 p f}