British equivalents of metric square measures

1 km² = 0.3861 sq. mile

1 m² = 10.764 sq. feet

1cm² = 0.155 sq. in.

1 mm² = 0.00155 sq. in.

3. Cubic Measures British:

1 cubic yard (cu. yd) =27 cubic feet

1 cubic foot (cu. ft) = 1,728 cubic inches (cu. in.)

1 gallon (gal.) = 4 quarts

1 quart (qt.) = 2 pints (pt.)

1 pint == 16 fluid ounces (U. S.) = 20 fluid ounces (Brit.)

Metric:

1 cubic metre (m³) = 1,000^000 cubic centimetres (cm³) 1 cubic centimetre = 1,000 cubic millimetres (mm³) 1 hectolitre (hi) = 100 litres (1) = 100,000 cubic centimetres 1 litre = 1,000 cubic centimetres

4. Weights (Avoirdupois) английская система мер веса для всех товаров, кроме благородных металлов, драгоценных камней и лекарств; основана на соотношении 1 фунт == 16 унциям и 1 унция =16 драхм

British:

1 long ton (tn. 1.) = 2,240 pounds = 20 hundredweight

1 short ton (tn. sh.) = 2,000 pounds

1 hundredweight (cwt.) =112 pounds

1 pound (Ib.) == 16 ounces (oz.)

1 ounce = 437.5 grains Troy - тройская унция

1 ounce ==16 drachm драхм

Metric:

1 metric ton (t) = 10 decitons (dt) 1 deciton = 100 kilograms (kg) 1 kilogram = 1000 grams (g)

Power and work

British:

1 horsepower (h.p.) = 33,000 foot-pounds per minute (ft-lb./ min) = 550 foot-pounds per second (ft-lb./sec)

1 British Thermal Unit (BTU) = 778 foot-pounds (ft-lb.)

1 horsepower-hour (h. p.-hr.) = 1,980,000 foot-pounds = 2,545 B.Th.

Metric:

1 metric horsepower (PS) = 75 kilogram-metres/second = 75 kgm/s

1 kilowatt (kW) = 1000 watts (W) = 102 kgm/s

1 kilowatt-hour (kWh) = 3,600,000 watt-seconds (W/s)

Relationship between various units:

1 h. p. = 746 W = 0.746 kW = 1.014 PS

1 h. p. = 76.065 kgm/s = 0.746 kVh

1 BTU = 0.000292 kWh = 0.252 kcal

1 ft.lb. = 0.1383 kgm

1 kgm = 7.231 ft-lb.

1 kcal= 3.968 BTU

1 kW =1.34 h.p. = 44,220 ft-lb./min = 3,415 BTU per hour|

1 W = 0.00134 h. p. = 44.22 ft-lb./min = 3.42 BTU per hoi|

Speeds

100 feet per minute (ft/min) =30.5 metres per minute (m/ min) = 0.508 metres per second (m/sec)

1 mile per hour (m. p. h.) = 1.609 km/h

The speed of shafts (e. g. of a motor) is expressed in terms of revolutions per minute (r. p. m.).

Temperatures

Temperatures are expressed in degrees of temperature scales. There are scales based on the following different units:

Celsius or Centigrade (C., °C)

Fahrenheit (F„ °F)

Reaumur (R., °R) ^':=;;'r

Kelvin (K., °K) /uW.

Relationship: 100 °C = 212 °F = 80 °R = 373 °K

Date: 2015-09-24; view: 520; Нарушение авторских прав