Sections 1(2), 8(1).
| Imperial units | |
|---|---|
| Mile | = 1760 yards. |
| Yard | = 0.9144 metre. |
| Foot | = 1 /3 yard. |
| Inch | = 1 /36 yard. |
| Metric units | |
| Kilometre | = 1000 metres. |
| Metre | is the length of the path travelled by light in vacuum during a time interval of 1 /299 792 458 of a second. |
| Decimetre | = 1/10 metre. |
| Centimetre | = 1/100 metre. |
| Millimetre | = 1/1000 metre. |
| Imperial units | |
|---|---|
| Acre | = 4840 square yards. |
| Square yard | = a superficial area equal to that of a square each side of which measures one yard. |
| Square foot | = 1/9 square yard. |
| Metric units | |
| Hectare | = 100 ares. |
| Decare | = 10 ares. |
| Are | = 100 square metres. |
| Square metre | = a superficial area equal to that of a square each side of which measures one metre. |
| Square decimetre | = 1/100 square metre. |
| Square centimetre | = 1/100 square decimetre. |
| Square millimetre | = 1/100 square centimetre. |
| Metric units | |
|---|---|
| Cubic metre | = a volume equal to that of a cube each edge of which measures one metre. |
| Cubic decimetre | = 1/1000 cubic metre. |
| Cubic centimetre | = 1/1000 cubic decimetre. |
| Hectolitre | = 100 Hires. |
| Litre | = a cubic decimetre. |
| Decilitre | = 1/10 litre. |
| Centilitre | = 1/100 litre. |
| Millilitre | = 1/1000 litre. |
| Imperial units | |
|---|---|
| Gallon | = 4.546 09 cubic decimetres. |
| Quart | = 1 /4 gallon. |
| Pint | = 1 /2 quart. |
| Gill | = 1 /4 pint. |
| Fluid ounce | = 1/20 pint. |
| Metric units | |
| Hectolitre | = 100 litres. |
| Litre | = a cubic decimetre. |
| Decilitre | = 1/10 litre. |
| Centilitre | = 1/100 litre. |
| Millilitre | = 1/1000 litre. |
| Imperial units | |
|---|---|
| Pound | = 0.453 592 37 kilogram. |
| Ounce | = 1/16 pound. |
| Ounce troy | = 12/175 pound. |
| Metric units | |
| Tonne, metric tonne | = 1000 kilograms. |
| Kilogram | is the unit of mass; it is equal to the mass of the international prototype of the kilogram. |
| Hectogram | = 1/10 kilogram. |
| Gram | = 1/1000 kilogram. |
| Carat (metric) | = 1/5 gram. |
| Milligram | = 1 /1000 gram. |
| Furlong | = 220 yards. |
| Chain | = 22 yards. |
| Square mile | = 640 acres. |
| Rood | = 1210 square yards. |
| Square inch | = 1/144 square foot. |
| Cubic yard | = a volume equal to that of a cube each edge of which measures one yard. |
| Cubic foot | = 1/27 cubic yard. |
| Cubic inch | = 1/1728 cubic foot. |
| Bushel | = 8 gallons. |
| Peck | = 2 gallons. |
| Fluid drachm | = 1/8 fluid ounce. |
| Minim | = 1/60 fluid drachm. |
| Ton | = 2240 pounds. |
| Hundredweight | = 112 pounds. |
| Cental | = 100 pounds. |
| Quarter | = 28 pounds. |
| Stone | = 14 pounds. |
| Dram | = 1/16 ounce. |
| Grain | = 1/7000 pound. |
| Pennyweight | = 24 grains. |
| Ounce apothecaries | = 480 grains. |
| Drachm | = 1/8 ounce apothecaries. |
| Scruple | = 1/3 drachm. |
| Metric ton | = 1000 kilograms. |
| Quintal | = 100 kilograms. |
| 1 | (a) ampere | is that constant current which, if maintained in two straight parallel conductors of infinite length, of negligible circular cross-section and placed 1 metre apart in vacuum, would produce between these conductors a force equal to 2 x10-7newton per metre of length. |
| (b) OHM | is the electric resistance between two points of a conductor when a constant potential difference of 1 volt, applied between the two points, produces in the conductor a current of 1 ampere, the conductor not being the seat of any electromotive force. | |
| (c) VOLT | is the difference of electric potential between two points of a conducting wire carrying a constant current of 1 ampere when the power dissipated between these points is equal to 1 watt. | |
| (d) WATT | is the power which in one second gives rise to energy of 1 joule. | |
| 2. | Kilowatt | = 1000 watts. |
| Megawatt | = one million watts. |