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/sci/ - Science & Math

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1265483 No.1265483 [Reply] [Original]

hey guise. i need some help with my physics work. it's to do with nuclear energy.
During the radioactive decay of cobalt-60, a gamma ray with 1.33MeV of energy is released. Calculate the decrease in mass (in kg) of the cobalt-60 nucleus as a result of this emission.
any help is greatly appreciated.

>> No.1265495

find the atomic mass of cobalt-60 and then convert the energy of the gamma ray into mass and deduct it from the mass of the cobalt-60

>> No.1265500

but how do i convert the energy into mass? that's where i get stuck.

>> No.1265502

E=mc^2

>> No.1265512

>>1265502
well, i did the E=mc^2, re-arranged it to m=E/c^2, i got an answer of 14.78x10^-18 kg, but in the answers it comes out to2.36x10^-30 kg

>> No.1265517

did you convert electronvolts into joules?

>> No.1265525

>>1265517
no, i'm kind of new to physics, not too great at it.

>> No.1265526

>>1265512
convert Mev into joules, m is in Kg, C is in m/s

>> No.1265535

>>1265526
so it's just 1.33(1.6x10^-19)?

>> No.1265545

>>1265535
its Mega-electron volts, you need to x10^6

>> No.1265546

>>1265535
1 Mev = 10^6 ev

>> No.1265589

thank you /sci/, thank you.

>> No.1265601

OP, is tht u in the pic

>> No.1265609

>>1265601
you must be new here

>> No.1265618

guys, lolcats..ahaha, guys?

>> No.1265624

>>1265609
you must be jew here

>> No.1265795

>>1265624
you must be jew nigga

>> No.1265798

>>1265795
you faggot be jew nigga