Q. An insulated Thermos contains 138cm3 of hot coffee at 95 °C. You put a 12g ice cube at its melting point to cool the coffee. By how numerous degrees has your coffee cooled once the ice has melted and equilibrium is reached? Care for the coffee as though it were pure water and neglect energy exchanges with the environment.
Q. A delivery truck travels 19 blocks north, 18 blocks west and 21 blocks south. What is its final displacement from the origin? Suppose the blocks are equal length.