1. Explain the reason for the general fitting of air conditioner at higher level on the wall of the room. 2. Instead of water explain the reason, why do the mercury is used in the thermometer? 3. Explain in brief, why we wear dark coloured clothes in winter and light coloured clothes in summer.
Answers
Answer:
Because hot air rises, so the opposite it true of cool air. Cool air will usually find itself going lower from the point of its entry. This is why air conditioning units are typically mounted up higher in a room, when practical.
Mercury is the only one in liquid state at room temperature. It's used in thermometers because it has high coefficient of expansion. Hence, the slightest change in temperature is notable when it's used in a thermometer. It also has a high boiling point which makes it very suitable to measure higher temperatures.
But in winters, the dark color clothes absorb a lot of heat because they are good conductors of heat, and they absorb most of the heat energy fallen on them. Thus, in summer we preferred to wear light or white color clothes and in winter, to wear dark color clothes.
Explanation:
Explanation:
Air conditioners are fitted at higher levels on the walls of a room in order to produce quick cooling in the room. This is because the cooled air from the AC comes down and the warm air from below rises up and a convection current is set up.
Below 0oC and above 100oC can't measure by using the water. The most metals are solids at room temperature but the mercury is liquid form because it has high coefficient of expansion. The mercury does not sticking to capillary wall of thermometer can easily measure temperature accurately.
in winters, the dark color clothes absorb a lot of heat because they are good conductors of heat, and they absorb most of the heat energy fallen on them. Thus, in summer we preferred to wear light or white color clothes and in winter, to wear dark color clothes.