Which of the following statements define properties, amounts of constituents, or parameters of the system described by the words in italics?
(a) The amount of metal evaporated from an incandescent filament.
(b) The rate at which metal evaporates from an incandescent filament.
(c) The number of dollars in a safe.
(d) The number of dollars placed in a safe on the first day of the year.
(e) The number of hours a liquid-air tank has supplied air.
(f) The number of hours a liquid-air tank can supply air at a specified rate.
(g) The maximum stress a piece of plastic material can withstand before failure.
(h) The color of the light emied from an incandescent filament.
(i) The color of a cold tungsten filament illuminated by solar light.