2007-03-12 14:51:43 · 6 answers · asked by JH 1 in Science & Mathematics ➔ Chemistry
assuming you're refering to rest mass
e = mc^2
m = e/c^2
m = 1 kj / (3 x10^8 m/s) = (1 kg m^2/s^2) / (9 x 10^16 m^2/s^2) x 1000 g / 1 kg
= (1 / (9 x 10^13) ) grams = 1.1 x 10^-14 grams
2007-03-12 15:08:10 · answer #1 · answered by Dr W 7 · 1⤊ 0⤋
there are no grams in a kilojoule....I think your question should be how many joules in a kilojoule and the answer would be 1000 (that is what kilo means 1000)
2007-03-12 14:58:07 · answer #2 · answered by Glenn T 3 · 0⤊ 1⤋
This is an example of basic misunderstanding of units. You might as well be asking how many miles are there in a 4.5 L engine, for that makes as much sense as what you are asking. Joules are a measure of work or energy, not mass. According to Sir Isaac Newton, force equals mass times acceleration (F=ma) and work is force times distance (W=dma). Joules are then measured in kg*m^2/s^2, where kg are kilograms, m are meters and s are seconds.
2007-03-12 15:05:36 · answer #3 · answered by Amphibolite 7 · 0⤊ 1⤋
A Gram is a unit of mass, Joules are a measure of energy.
2007-03-12 14:58:59 · answer #4 · answered by aussie1_1950 2 · 0⤊ 1⤋
1 joule= (1kg m^2)/s^2
so you can't convert joules into grams because grams is a measurement of mass and a joule is a measurement of energy
2007-03-12 15:01:14 · answer #5 · answered by Rachel B 2 · 0⤊ 1⤋
e=mc^2 relates energy to mass........1KJ=mc^2
2007-03-12 15:37:14 · answer #6 · answered by michael r 1 · 0⤊ 0⤋