A 30.4-kg block of ice at 0 °C is sliding on a horizontal surface. The initial speed of the ice is 7.00 m/s and the final speed is 3.46 m/s. Assume that the part of the block that melts has a very small mass and that all the heat generated by kinetic friction goes into the block of ice, and determine the mass of ice that melts into water at 0°C. Number Units
A 30.4-kg block of ice at 0 °C is sliding on a horizontal surface. The initial speed of the ice is 7.00 m/s and the final speed is 3.46 m/s. Assume that the part of the block that melts has a very small mass and that all the heat generated by kinetic friction goes into the block of ice, and determine the mass of ice that melts into water at 0°C. Number Units
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A 30.4-kg block of ice at 0 °C is sliding on a horizontal surface. The initial speed of the ice is 7.00 m/s and the final speed is 3.46 m/s.
Assume that the part of the block that melts has a very small mass and that all the heat generated by kinetic friction goes into the block
of ice, and determine the mass of ice that melts into water at 0 °C.
Number
Units
Transcribed Image Text:Occasionally, huge icebergs are found floating on the ocean's currents. Suppose one such iceberg is 120 km long. 37.9 km wide, and
161 m thick. (a) How much heat in joules would be required to melt this iceberg (assumed to be at 0 °C) into liquid water at 0 °C? The
density of ice is 917 kg/m³. (b) The annual energy consumption by the United States in 1994 was 9.3 x 1019 J. If this energy were
delivered to the iceberg every year, how many years would it take before the ice melted?
(a) Number
(b) Number
Units
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