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The official unit for length is the meter. The kilometer (1000 meters) is often used in practice. Larger distances/lengths are often expressed in meters or kilometers; if the numbers are very large, scientific notation is used. On the other hand, in astronomy the following non-SI units are often used for very large distances:
- The astronomical unit, which is the average distance from Sun to Earth. Approximately 150 million km.
- The light-year, the distance light travels in a year. Approximately 9.5 x 1012 km.
- The parsec - a hypothetical star at that distance would have a parallax of 1 arc-second (all stars except the Sun are at a distance of more than 1 parsec). 1 parsec is approximately 3.26 light-years. Prefixes such as kilo- and mega- are sometimes used with parsec.
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Units represents the shortest unit of length?
The shortest unit of length is the Planck length, which is approximately 1.6 x 10^-35 meters. At this scale, the fabric of spacetime is thought to be quantized, and traditional notions of length may break down.
What is the unit weight of 16mm?
The unit weight of a 16mm steel bar is approximately 1.58 kg/m.
Why strain has no unit?
Strain is a dimensionless quantity that represents the deformation of an object relative to its original size. It is calculated as the change in length divided by the original length, making it unitless. This is because strain is a ratio of two lengths, and as such, it does not require a unit to quantify its value.
What is the symbol for dekameter?
The symbol for dekameter is "dam". It represents a unit of length equal to 10 meters.
If measured in centimeters the unit for volume when calculated as length x width x height is?
The unit for volume when calculated as length x width x height in centimeters is cubic centimeters (cm^3). This unit represents the volume of a three-dimensional space measured in linear centimeters cubed.
