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# What is the difference between fundamental and derived quantities?

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### Quick Answer

**The metric system (SI) defines seven fundamental quantities that cannot be further broken down, from which all other derived quantities come.** The meter is the fundamental quantity for length. Area uses the derived quantity of square meters and volume uses cubic meters.

When measuring very small or very large units, use of the fundamental unit often becomes cumbersome. Measuring the width of a human hair using the meter requires a decimal point and several zeros. The SI system handles this prefixes that describe multiplying the base unit by a power of ten. Measuring the hair in nanometers (0.000000001 meter) is more appropriate.

Units such as the day, hour and astronomical unit, are not officially a part of the metric system, but they are often used in science. These units are also possible to derive from the SI fundamental quantities. For example, a day is 86,400 seconds, according to HowStuffWorks.

Some derived units have special names. For example, the metric system also uses the liter to measure volume. One liter is 1000 cubic centimeters. The Newton, for measuring force, is the product of acceleration (meters per second squared) and mass (kilogram) or kilogram meter per second squared. Many of the special names given to the derived units honor the work of scientists in the area the unit represents.

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## What is work measured in?

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Full Answer >**In the metric system, the joule is the unit of measure for work.**In physics, a force does work on an object when the object moves in the direction of the force. The formula for work states that it is equal to a force multiplied by the distance.Filed Under: -
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## How long is a linear meter?

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Full Answer >**A linear meter is equal to 39.37 inches, 3.28 feet or 1.28 yards in the U.S. customary system of measurement.**A linear meter is a standard metric unit used to measure length.Filed Under: -
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## What is a metric chart?

A:A metric chart is a graphical representation listing metric units, and it shows how to convert them into equivalent units within the metric system or within other standard measurement systems. For example, many metric charts list U.S. customary units alongside metric units for ease of converting one into the other.

Full Answer >Filed Under: -
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## What is the prefix that means 1/1000 of a unit?

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Full Answer >**According to the Encyclopedia Britannica, in the metric system the prefix "milli" is used to designate one-thousandth of a unit.**A common example would be a millimeter, which is equal to one-thousandth of a meter.Filed Under: