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14 results for “water”

Formulae (14)

SG = \frac{\rho}{\rho_{water}}

Density relative to water.

K_w = [H^+][OH^-] = 10^{-14}

Self-ionization constant of water at 25°C.

BOD = \frac{D_1 - D_2}{P}

Oxygen consumed by microbes decomposing organic matter.

W = 0.033 \times m

Rough daily water need in litres.

E = 4P + 4C + 9F + 7A

Total food energy in kilocalories from its macronutrients using the Atwater factors.

H = \frac{m_{water}}{m_{flour}} \times 100

Water as a percentage of flour — controls how wet and open a dough is.

S = \frac{m_{salt}}{m_{salt}+m_{water}} \times 100

Salt concentration of a brine or curing solution by mass.

a_w = \frac{p}{p_0}

Ratio of a food's vapour pressure to pure water — governs microbial spoilage.

w/c = \frac{m_{water}}{m_{cement}}

Ratio controlling concrete strength and workability.

v = \sqrt{g\,d}

Speed of a shallow-water wave across the ocean.

Q = -KA\frac{\Delta h}{L}

Rate of groundwater flow through porous rock.

pH = -\log_{10}[H^+]

Acidity from hydrogen ion concentration.

WUI = \frac{V_{water}}{Output}

Water consumed per unit of product or service.

C_1 V_1 = C_2 V_2

Relates concentration and volume before and after dilution.