According to the mass continuity equations for a fluid, given two points in a fluid, the product ofdensity, fluid velocity, and this quantity at those points will be equal. Fourier's law of conduction states thatthe change in big Q with time is negatively proportional to the product of this quantity and the derivative oftemperature with position. The Stefan-Boltzmann constant has units of power divided by the product of thefourth power of temperature and a measure of this quantity. Teslas are equivalent to one weber per thismeasure and is thus 
According to the mass continuity equations for a fluid, given two points in a fluid, the product ofdensity, fluid velocity, and this quantity at those points will be equal. Fourier's law of conduction states thatthe change in big Q with time is negatively proportional to the product of this quantity and the derivative oftemperature with position. The Stefan-Boltzmann constant has units of power divided by the product of thefourth power of temperature and a measure of this quantity. Teslas are equivalent to one weber per thismeasure and is thus used to measure magnetic flux density. Kepler's second law states that orbits sweep outequal this in equal time. For 10 points, name this quantity which can be reported in square meters.
According to the mass continuity equations for a fluid, given two points in a fluid, the product ofdensity, fluid velocity, and this quantity at those points will be equal.
surface area [or cross-sectional area; or square meters until it is read; prompt on "surface"; prompt on "cross-section"]