Why it is advantageous to paint the outer walls and roof of a house white in hot weather ?

Why the walls and roof of the green house are made of glass ?

In places of hot climate, it is advised that the outer walls of houses be painted white. Why ?

In places of hot climate it is advised that the outer walls of houses be painted white. Explain

The figure shows the cross-section of the outer wall of a house buit in a hill-resort to keep the house insulated from the freezing temperature of outside. The wall consists of teak wood of thickness L_(1) and brick of thickness (L_(2) = 5L_(1)) , sandwitching two layers of an unknown material with identical thermal conductivites and thickness. The thermal conductivity of teak wood is K_(1) and that of brick is (K_(2) = 5K) . Heat conducion through the wall has reached a steady state with the temperature of three surfaces being known. (T_(1) = 25^(@)C, T_(2) = 20^(@)C and T_(5) = - 20^(@)C) . Find the interface temperature T_(4) and T_(3) .

Mr. X was advised by an architect to make outer walls of his house with hollow bricks . The correct reason is that such walls (a) make the building stronger (b) Help keeping inside cooler in summer and warmer in winter (c ) Prevent seepage of moisture from outside (d) Protect the building from lightning

Mr. Firoze is a retired man who lives in a big house. He has recently replaced all the filament-type bulbs in his house by CFls. His wife and children have a habit of keeping the lights and fans on (even when there is no one in the room) but Mr. Firoze keeps on going to every room periodically to switch them off. A few days back Mr. Firoze had purchased a device which can cook rice and dal without using any usual fuel. He has also installed an equipment on the roof of his house to obtain hot water. Mr. Firoze uses bicycle for short distances like going to nearby market, instead of scooter or car. (a) What is CFL ? Why has Mr. Firoze replaced all the filament-type bulbs in his big house by CFLs ? (b) Why does Mr.Firoze keep switching off lights and fans when no one is in the rooms ? (c) Name the device which Mr. Firoze has purchased to cook rice and dal without using any usual fuel ? (d) Name the equipment which Mr. Firoze has installed on the house-roof to obtain hot water ? (e) Why does Mr. Firoze use bicycle for going through short distances ? (f) What values are displayed by Mr. Firoze by all the above actions ?