what is the mass equivalence of a 35 KeV x-ray?

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what is the mass equivalence of a 35 KeV x-ray?

2007-02-19 08:05:39 · 3 answers · asked by pattycake9000 1 in Science & Mathematics ➔ Physics

3 answers

Einstein's famous formula is what you need.

Looking it up, pluggin' & chugging the numbers, and getting the units correct is your job.

2007-02-19 08:15:05 · answer #1 · answered by MAF 2 · 0⤊ 1⤋

Actually, the question has the answer in it. 35 KeV. Do you need it converted to grams? Pounds? Or is that a suitable answer for your class? (Electron-volts is a perfectly satisfactory unit for mass as well as energy.)

2007-02-19 08:18:43 · answer #2 · answered by roynburton 5 · 0⤊ 0⤋

E= mc^2

You have to convert keV to Joules, then divide by c^2

1 eV = 1.602 *10^-19 Joules (a constant you should probably memorize)

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2007-02-19 08:17:52 · answer #3 · answered by tlbs101 7 · 0⤊ 0⤋