Page 4 - Fair, Geyer, and Okun's Water and wastewater engineering : water supply and wastewater removal

JWCL344_ifc.qxd 8/26/10 8:31 PM Page 2

Customary Equivalents* 3.281 ft/s 0.003281 ft/s 2,237 mph or mi/h 9.549 rpm 0.6722 poundal(s)/ft 2 lb-s/ft 2 10 5 2.088 0.0001450 lb/in. 2 0.14507 lb/in. 2 14.50 lb/in. 2 32 ºF 1.8(ºC) 1.8(ºK) 459.67 ºF 10 7 2.778 kWh 10 7 3.725 0.7376 hp-h 9.478 ft-lb Btu 10 4

1 N-m where meters are measured along the line of action

Recommended Units Comments Symbol m/s mm/s km/s rad/s Pa-s Z N/m 2 or Pa kN/m 2 or kPa bar ºC ºK 1 joule J of force N.

METRIC CONVERSION TABLES

meter per millimeter per second kilometers per second radians per pascal second centipoise newton per square meter or pascal kilonewton per square meter or kilopascal (centigrade) Kelvin (abs.)

Unit second second bar Celsius joule

Description Velocity linear Angular Viscosity Pressure or stress Temperature Work, energy, quantity of heat

1.094 yd in. 10 5 acre ft 10 7

Customary Equivalents* 3.281 ft 0.6214 mi 0.03937 in. 3.937 Å 10 4 1 10.76 ft 2 1.196 yd 2 0.3861 mi 2 247.1 acres 0.001550 in. 2 2.471 acres 35.31 ft 3 1.308 yd 3 1.057 qt 0.2642 gal 8.107 2.205 lb 0.03527 oz 15.43 grains 0.01543 grains 0.9842 ton (long) 1,000 kg 1.102 ton (short) 0.2248 lb 7.233 poundals

Recommended Units Comments Symbol Basic SI unit m km mm mm or m m 2 km 2 mm 2 The hectare (10,000 ha m 2 ) is a recognized multiple unit and will remain in international use. m 3 L Basic SI unit kg g mg 1 tonne t The newton is that N force that produces an acceleration of in a mass 1 m/s 2 of 1 kg.

Unit meter kilometer millimeter micrometer or micron square meter square kilometer square millimeter hectare cubic meter liter kilogram gram milligram tonne newton

Description Length Area Volume Mass Force