Q. What mass (in grams) of steam at 100°C must be mixed with 352 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 27.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, and the latent heat of vaporization is 2256 kJ/kg.
Q. Three objects with masses, m1 = 6.0 kg, m2 = 10.0 kg, and m3 = 15.0 kg, are attached by strings over frictionless pulleys as indicated. The horizontal surface is frictionless and the system is released from rest. Using energy concepts, find the speed of m3 after it moves down 5.0 m.