# Dimensional Analysis UNITS Fundamental Units Definitions Definitions

## Dimensional Analysis UNITS Fundamental Units Definitions Definitions

Brown, Jeffrey, Founder/Editor has reference to this Academic Journal, PHwiki organized this Journal Dimensional Analysis Conversions of Units UNITS The world-wide scientific community uses the metric system to make measurements. SI units: System International dUnites SI units are related by powers of 10 (making it easy to convert between) Fundamental Units Time: seconds (s) Length: metres (m) Mass: kilograms (kg) Other quantities can be described using these three units. Derived units are combinations of fundamental units. i.e. Speed: m/s

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Definitions Note: You are NOT responsible as long as these definitions! They are just as long as knowledge sake! Distance (m): The metre is the length of the path travelled by light in a vacuum during a time interval of 1/299 792 458 of a second. Definitions Note: You are NOT responsible as long as these definitions! They are just as long as knowledge sake! Mass (kg): The kilogram is equal to the mass of the international prototype of the kilogram. Definitions Note: You are NOT responsible as long as these definitions! They are just as long as knowledge sake! Time (s): The second is the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium 133 atom.

Why do we need to convert units They are EXACT so we can compare worldwide (even the USA). They are used by the scientific community in addition to have been used since 1960. Dimensional Analysis Identify the given or known data (in as long as mation). Identify the unknown. Plan the solution or calculations by either: setting up a series of conversion factors OR using a as long as mula Check your work by cancelling out units. Example 1: Conversion within Fundamental SI units A space shuttle orbits the Earth at an altitude of 300 000 m. What is its altitude in: A) mm B) km

Example 2: Conversions between SI units in addition to non-SI units Calculate the number of cm in 20 inches if you know that 1 inch = 2.54 cm. Example 3: Multiple step conversions A person on a diet might lose 2.3 kg per week. Express the mass loss rate in mg per second. Questions as long as you How many seconds are in 1 year (note: 1 year is 365.25 days ) Both the 100 yard in addition to the 100m dash are used in track events. Which is longer in addition to by how much (note: 1 yd = 0.9144 m)

## Brown, Jeffrey Founder/Editor

Brown, Jeffrey is from United States and they belong to TradeshowLife and they are from  Costa Mesa, United States got related to this Particular Journal. and Brown, Jeffrey deal with the subjects like Conference/Meeting Planning

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