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megajoule

megajoule

2 6.0
A unit of energy equal to one million joules
  • noun
  • /ˈmɛɡəˌdʒuːl/
  • Specialized
translation icon : megajulio
  • Solar radiation (in megajoules per square meter per day)
  • megajoules per cubic meter

Examples

  • The solar panels generated 150 megajoules of energy today, which will power the electric vehicle for several miles.

  • The expired fraction (Ef) is calculated as a function of incoming solar radiation (Rad) in megajoules (MJ) per square meter (m):

    Academic text (2005)
  • Yield range (in megajoules per square meter per year)

    Academic text (2012)
  • Recently we deployed an 18-megajoule particle beam weapon into orbit.

  • There's one ionization energy megajoules per mole relative number of electrons.

  • Ten-megajoule lasers.

  • The modified wheel stored 5.8 megajoules at burst speed and released 1.1 megajoules during the burst event.

    Academic text (1996)
  • The modified wheel stored 5.8 megajoules at burst speed and released 1.1 megajoules during the burst event.

    Academic text (1996)
  • If the numerator and denominator are expressed in the same units (barrels per barrel, MegaJoules per MegaJoule), the result is a dimensionless ratio, i.e., 100:1 or 10:1.

    Blog text (5)
  • The fuel gas calorific value was typically 4.2 megajoules per cubic meter (wet, net, purge-free basis) and fuel conversion efficiency 78 percent (dry ash-free, mass basis).

    Academic text (2000)

How Much

megajoule
  • Specialized
2 6.0
joule
  • Specialized
11 7.2

Surface Forms

megajoule singular
megajoules plural

Morphology

megajoule = joule (transparent) = mega + joule

The word is a standard scientific prefixation meaning 'one million' plus the base unit 'joule'.

Etymology

Megajoule is made of the prefix mega- meaning 'million' and joule, the name for a unit of 'energy'. So a megajoule is simply a measure of energy equal to one million joules.