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Calra

Ón Vicipéid, an chiclipéid shaor.
Bosca Sonraí AonadCalra

Cuir in eagar ar Wikidata
Cineálaonad fuinnimh agus aonad díorthaithe UCUM Cuir in eagar ar Wikidata
Aonad defuinneamh Cuir in eagar ar Wikidata
Tiontuithe aonad
In aonaid SI4.184 J Cuir in eagar ar Wikidata


Seanaonad fuinnimh, i bhfoirm teasa de ghnáth. An méid teasa is gá chun 1 g uisce a théamh ó 15 °C go dtí 16 °C. Is ionann calra is 4.184 J (giúl), méid an-bheag fuinnimh. Mar shampla, bíonn gá ag gnáthdhuine le 2.5 milliún calra óna chuid bia gach lá. Mar sin, luaitear an fuinneamh a fhaightear ó mheitibileacht bia — a luach calrach — ina chileachalraí (1,000 calra) nó ina chalra mór, a scríobhtar le ceannlitir mar seo: Calra, giorraithe go dtí C. Mar sin, luach timpeall 2,500 kC de bhia a bhíonn ó ghnáthdhuine gach lá.[1]

  1. Hussey, Matt (2011). "Calra". Fréamh an Eolais. Coiscéim. p. 111.
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