Science / Chemistry / Equilibrium Constant: The product of the concentrations of the products, divided by the product of the concentrations of the reactants, for a chemical reaction at equilibrium. For example, the equilibrium constant for A + B = C + D is equal to [C][D] / ([A][B]), where the square brackets indicate equilibrium concentrations. Each concentration is raised to a power equal to its stoichiometric coefficient in the expression. The equilibrium constant for A + 2B = 3C is equal to [C]3/([A][B]2). For gas phase reactions, partial pressures can be used in the equilibrium constant expression in place of concentrations.
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Technology / Radar / Fast Time Constant (FTC): With ftc in operation, only the leading edge of an echo of a long-time duration is displayed on the radarscope. Ftc tends to reduce saturation of the scope by clutter. Also called anti-clutter or diff MORE
Technology / Radar / Fast Time Constant (FTC) Circuit: An electronic circuit designed to reduce the undesirable effects of clutter. With the ftc circuit in operation, only the nearer edge of an echo having a long time duration is displayed on the radarsco MORE
Science / Tides and Currents / Harmonic Constants: The amplitudes and epochs of the harmonic constituents of the tide or tidal current at any place. MORE