Surface tension of water is 73 dyne cm^(-1) at 20^(@)C. If surface area is increased by 0.10" m"^(2), work done will be

Surface tension of water is 73 dyne cm^(-1) at 20^(@)C. If surface are

1.	Surface tension of water is 73 dyne cm^(-1) at 20^(@)C. If surface area is increased by 0.10" m"^(2), work done will be
Answer» 73 ergs 730 ergs 7300 ergs 73000 ergs Solution :Work done=Surface tension xxIncrease in surface AREA `=73" dyne "CM^(-1)xx0.1" m"^(2)` `=73" dynwe "cm^(-1)xx0.1xx10^(4)"ergs"` `=7.3xx10^(4)" dyne " cm=7.3xx10^(4)" ergs"`