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Query: WHAT IS THE DIGIT IN HIGHLIGHTED PORTION? 5. It has been suggested that the surface melting of ice plays a role in enabling speed skaters to achieve peak performance. Carry out the following calculation to test this hypothesis. At 1 atm pressure the density of ice is 920 kg m-3, and the density of liquid water is 997 kg m-3. (a) What pressure is required to lower the melting temperature by 5.0 °C? (b) sharpening to 25 × 10^-3 cm, and that the length of the contact area is 15 cm. If a skater of mass 85 kg is balanced on one skate, what pressure is exerted at the interface of the skate and the ice? (c) What is the melting point of ice under this pressure? (d) If the temperature of the ice is -5.0 °C, do you expect melting of the ice to occur at the ice-skate interface?

          Query: WHAT IS THE DIGIT IN HIGHLIGHTED PORTION?
5. It has been suggested that the surface melting of ice plays a role in enabling speed skaters to achieve peak performance. Carry out the following calculation to test this hypothesis. At
1 atm pressure the density of ice is 920 kg m-3, and the density of liquid water is 997 kg m-3.
(a) What pressure is required to lower the melting temperature by 5.0 °C?
(b) sharpening to 25 × 10^-3 cm, and that the length of the contact area is 15 cm. If a skater of mass 85 kg is balanced on one skate, what pressure is exerted at the interface of the skate and the ice?
(c) What is the melting point of ice under this pressure?
(d) If the temperature of the ice is -5.0 °C, do you expect melting of the ice to occur at the ice-skate interface?

Added by James M.

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