GENERAL KNOWLEDGE

GK

PHYSICS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
It takes much longer to cook food in the hills than in the plains, because
A
in the hills the atmospheric density is low and therefore a lot of heat is lost to the atmosphere
B
in the hills the humidity is high and therefore a lot of heat is absorbed by the atmosphere leaving very little heat for cooking
C
due to low atmospheric pressure on the hills, the water boils at a temperature higher than 100
D
in the hills the atmospheric pressure is lower than that in the plains and therefore water boils at a temperature lower than 100
Explanation: 

Detailed explanation-1: -At high altitudes, there is a decrease in atmospheric pressure. As atmospheric pressure decreases, water boils at lower temperatures. Because water boils at a lower temperature at higher elevations, foods that are prepared by boiling or simmering will cook at a lower temperature, and it will take longer to cook.

Detailed explanation-2: -Water boils at a lower temperature on the hills, where the atmospheric pressure is lower than in the plains. This is why it takes longer time to cook in hilly regions.

Detailed explanation-3: -Pressure at a point is caused due to the huge mass of air over it. So when we take a point as we go higher, there is lesser air above it, thus air pressure decreases with increase in elevation.

Detailed explanation-4: -Since decrease in air pressure causes decrease in boiling temperature, because of which it takes more time to cook at hilly areas or high altitudes.

Detailed explanation-5: -At high altitudes: Air pressure is lower, so foods take longer to bake. Temperatures and/or bake times may need to be increased. Liquids evaporate faster, so amounts of flour, sugar and liquids may need to be changed to prevent batter that is too moist, dry or gummy.

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