Simple Introductory Problem that's giving me troubles

[ChaseRLewis]

Homework Statement

1-3 A burst of 1014 electrons accelerated to an energy of 15MeV per electron is stopped in a copper target block of mass 100g. If the block is thermally insulated, what is its temperature rise? The specific heat of copper is 0.09 cal/g K

Homework Equations

m*Cp*dT = dQ

The Attempt at a Solution

Assume 100% of KE transfer to heat.
Negligible mass increase.

(100g)*(.09 cal/g K) dT = 1014 electrons * 15 MeV/electron * 2.6144*10^(-13) cal/MeV

The solution is supposed to be 6.3 K but what I have above isn't even remotely close (way too small). I'm trying to guide myself through a special relativity book and given this is was the only problem in the beginning I couldn't get to matchup I feel a bit awkward posting it because it seems so simple : /.

 

[Sourabh N]

Probably a typo? If you take the number of electrons as 10¹⁴ and divide by 2.6.. instead of multiplying (you did a calculation mistake, it seems), the answer comes out to be ~6.3 K.

 

[ChaseRLewis]

Probably a typo? If you take the number of electrons as 10¹⁴ and divide by 2.6.. instead of multiplying (you did a calculation mistake, it seems), the answer comes out to be ~6.3 K.

Ah thanks it was the 10^14 rather than 1014 : / got to get used to these ebook prints.