I decided today on a friend of the EEG in physics. Literally (I can show the photo):

A10: The temperature of the iron piece weighing 200g decreased from 70' to 50'. How much heat has the particle given?"

Answers: a)256J; b)2.56kJ; c)128J; g)1.28kJ

Solution: energy = mass * heat capacity (table data) * change of temperature =
0.2*460*(70-50)=1840 J 0_o

Well, I think it's okay, in the table of Egeshna, I went to Wikipedia, there is a heat capacity of iron 450 (i.e. Reply to 1800

Now I understand why of the 750,000 graduates on 100 points write about 100: little that you need to know the subject, you still need to guess what answer 'true' (: