Why an ice block melt at the bottom first?

When ice melts at 1^(@)C :

When ice melts into water, entropy

The rate at which ice melts is more at the top when compared to the bottom of the blacier. Explain whether the statement is true capacities.?

A cubical ice block of side length 'a' is floating in water in a beaker. Find the change in height of the centre of mass of (water+ice) system when the ice block melts completely. It is given that ratio of mass of water to mass of ice originally in the containe is 4:1.

Why does ice melt showly at higher altitudes?

The opposite faces of a cubical block of iron of cross-section 4 square cm are kept in contact with steam and melting ice. Calculate the quantity of ice melted at the end of 10 minutes. k for iron = 0.2 CGS units.

A bullet of mass 10 g moving with a speed of 20 m/s hits an ice block of mass 990 g kept on a frictionless floor and gets stuck in it. How much ice will melt if 50\% of the lost KE goes to ice? (initial temperature of the ice block and bullet = 0^(@)C )