A. Free electrons
B. Free atoms
C. Free molecules
D. Free solids
Correct Answer: Option A
A. Free electrons
Explanation
– Conduction is explained in terms of the free electrons.
– Convention is explained in terms of the movement of the fluid involved.
– Radiation is explained in terms of invisible electromagnetic wave

![Calculate the quantity of heat needed to change the temperature of 60g of ice at 0 °C to 80 °C. [specific latent heat of fusion of ice= 3.36 x 105 Jkg‾¹ specific heat capacity of water 4.2 x 10³ J kg‾¹ K‾¹] past-questions-and-answers](https://erudites.ng/wp-content/uploads/2020/06/past-questions-and-answers-150x150.jpg)