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Bigjlw

At what temperature does hydrogen fuse?

Is there an exact number?
Johnny:

Within the sun Hydrogen Fusion occurs at temperatures of 10 to 15 million degrees Kelvin. To carry out fusion on Earth temperatures of 100 million Kelvin would be required.

Check out this website for some intersesting basics.

http://www.jet.efda.org/pages/content/fusion1.html

Booboo:

Also it depends on the particular reaction (proton-proton, or deuterium-tritium, etc).

Bigjlw:

Why would the temperature need to be hotter on earth than in space for fusion to occur?

Jhw857:

E=mc2 squared will lend help in your quest for an answer! :)

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