Q. What mass (in grams) of steam at 100°C must be mixed with 483 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 69.0°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. Learning Goal: To be able to calculate couple moments.
A couple is defined as two parallel forces, separated by a distance, that have equal magnitudes but opposite directions. A couple only produces a rotation in a specified direction. The moment produced by a couple is called a couple moment.