

Explanation
(a)(i) Conduction and Radiation.
(ii)


The specific heat capacity of land is less than that of sea. Land Breeze: At night land cools faster than sea, warm air from above the sea rises upward. It's place is taken by cooler air from above the land. Sea Breeze: During the day the land is hotter than the sea. Warm air above land rises, and its place is taken by cooler air from the sea.
(b) Increase in length (L\(_2\) - L\(_1\) = L\(_1 \alpha \Delta \theta = 30 \times 1.2 \times 10^{-5} \times 50 = 1.8 \times 10^{-2}\) cm

(c) Ivt = mc\(\Delta \theta\)
Power x time = mc\(\Delta \theta\)
(i) Iv x 360 = m x c 60 ----(i) Ivt = \(\frac{1}{2}\)mL
(ii) Ivx 25 x 60 = \(\frac{1}{2}\)mL ------(ii)
\(\frac{Iv \times 25 \times 60}{Iv \times 360} = \frac{\frac{1}{2}mL}{mc \times 60}\)
L = \(\frac{25 \times 60 \times C \times 60 \times 2}{360}\)
= \(\frac{25 \times 60 \times 4200 \times 60 \times 2}{360}\)
= 2.1 x 10\(^5\) Jkg\(^{-1}\)

