Metric System

The SI, or metric, system is devided into two sets of units; base units and derived units. The base units are used to define all other units. There are seven base units.

metre, m. length.

kilogram, kg, mass.

second, s, time.

ampere, A, electrical current.

kelvin,K, temperature.

candela, cd, luminous intensity.

mole, mol, amount of substance.

The SI Unit for frequency is the hertz also known as an inverted second denoted by s-1.

The use of the metric system made legal in the United States by the Metric Act of 1866 (Public Law 39-183). This law made it unlawful to refuse to trade or deal in metric quantities.

Area of rectangular room = length * breadth. it is measured in square units.

I'd use inches, but centimeters could also work.

A centimetre, usually.

newton

The Metric system is based on the number 10 and its multiples, which includes numbers like 100, 1,000, 10,000, etc.

80 liters will fill a good sized fish tank [about 21 gal]. 80 milliliters would hardly start, as that is about 5 tablespoons.

The unit of length in the metric system is the meter (m); many derivatives are also used: kilometer, centimeter, micrometer, nanometer, etc.

Approximately 1270 liters of glycerin are in 1 ton.

so we can measure your head

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Because it's easier to use. Every unit is divisible by 10. It's designed for used with the decimal point. The last I heard, there are only 3 countries (U.S., Liberia, and Burma) in the world that don't use the Metric system. It is used exclusively in science because of the fact it is easier to use. Even the U.S. uses the metric system in science and medicine.

Inches are part of the English system and centimeters are part of the metric system.

Grams for example:

Kg,mg,g or kilogram milligram and gram

The USA does NOT use the metris system, but the rest of the world decided to use one system to make it easier on everyone, so that they didn't have to change units when they moved between countries. I have no idea why the USA didn't.

Since length is measured in meters, and time in seconds, it follows that speed is measured in meters/second.

Meters in the metric system is equal to the unit of length.

The base unit of distance is the metre, this means all distances are measured in metres. For distances less than a metre, prefixes are used which indicate fractions of a metre; 1 millimetre is 0.001 metres, 1 micrometre is 0.000 001 metres, 1 nanometre is 0.000 000 001 metres.

For distances greater than a metre, prefixes that indicate multiples of metres are used; 1 kilometre is 1 000 metres, 1 megametre is 1 000 000 metres, 1 gigametre is 1 000 000 000 metres. In practice the prefixes above kilometre are rarely used outside of technical papers.

100 kilometres are 100 000 metres, this could be expressed as 0.1 megametres (0.1 Mm), but would usually be written as 100 km (kilometres).

Note: the symbol for mega- (million) is an uppercase M, the symbol for milli- (thousandth) is a lowercase m.

to transport water to farms and villages

One hundredth of a gram is 10 milligrams.

The SI unit of electric current is the ampere. While it is an SI base unit, it can also be considered to be a combined unit, coulombs per second.

None. A gram is a smaller unit of measurement: Grams,Ounces,Pounds,Kilograms (Least to Greatest)

one thousandth kg = g = 0.001 kg

imperial system

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The Metric and Imperial systems are alternative systems!

The metric system is properly known as the International System of Units, abbreviated, from its French name: Système international d'unités to SI units.

The English system is based on arbitrary numbers and measurements, such as 12, 36, and 5,280. The Metric system - every aspect of it - is based on even multiples of ten, both going upward, and going downward. Just ten. Nothing else.