physics
posted by JOHN .
(a) How much heat is required to raise by 12.40°C the temperature of 1.4 kg of water.
(b) How much heat is required to raise by 12.40°C the temperature of 1.4 kg of iron.

Q =c•m•Δt,
where c is the heat capacity for
Water (liquid): c = 4185.5 J/(kg•K), and for Iron: c = 4500 J/(kg•K)