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18. A mercury drop of 1 cm radius is broken into

106 small drops. The energy used will be (surface tension of mercury is 35 x10-3N/cm

(a) 4.4 x 10-3 j

(b) 2.2 x 10-4 j

(c) 8.8 x 10-4 j

(d) 104 j

Ans. a

(12)

4.9/5 - (7 votes)

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