A rigid metallic rod of rectangular cross section lies on a block of ice. The width of the bar is 2mm. The length of the bar in contact with ice is 25mm. Two equal masses each of mass M are hung from the ends of the bar. The entire system is maintained at atmospheric pressure and the ice is maintained at T = 2 C. What is the minimum value of M for which the bar will pass through the block of ice? If the metal rod was replaced with a semi-flexible metallic wire of similar dimensions, would the minimum mass required be more or less than the one calculated above. Explain your reasoning. Given data: density of ice = 0.8 gm/cm3 , density of water = 1.0 gm/cm3 , latent heat of fusion for water = 80 cal/gm.