WAEC - Physics (2018 - No. 12)

According to Newton's law of cooling, the heat energy lost per unit area of a body depends on the

I. Surface area

II. Nature of the surface

III. Temperature of the surface

IV. Excess temperature over the surroundings

I and II only

II and IV only

I,II and III

I, II and IV

The rate of cooling of liduid according to Newton's law of cooling depends on:

- Temperature of the liquid

- Temperature of the enclosure

- The area of the exposed surface

- The nature and extent of the surface of the containing vessel