Q. The heat of fusion for water is 80. cal/g. How many calories of heat are released when 20.0 g of water at 30. °C is cooled to 0 °C and frozen to ice at 0 °C
Q. A person walks 5.0 km due east, then 3.0 km due north and finally stops after walking an additional 2.0 km due north east. how far and in what direction relative to his starting point is he?