An ice cube has a mass of 7.50g. The ice cube is at 0°C. Heat from the surroundings reaches the ice-cube at an average rate of 1.25 J/s. How long does it take for all of the ice cube to melt? Where the specific latent heat of fusion of ice = 333J/g
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The three-dimensional structure of a double-stranded DNA molecule may be described by distinguishing the helical turns of the DNA duplex from any superhelical turns that might be superimposed upon the duplex turns. ... These results are interpreted as showing that human DNA is supercoiled.
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