Physics
Plants are dried up in winter due to frost because

Evaporation does not take place
There is mechanical loss of tissues and drought condition prevails
Respiration does not take place at low temperature
Photosynthesis does not take place at such low temperature

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Physics
What is the direction of torque?

Opposite to the direction of applied force
Parallel to the radius
Perpendicular to the direction of applied force
Same as the direction of applied force

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Physics
It takes much longer to cook food in the hills than in the plains, because

in the hills the humidity is high and therefore a lot of heat is absorbed by the atmosphere leaving very little heat for cooking
due to low atmospheric pressure on the hills, the water boils at a temperature higher than 100oC and therefore water takes longer to boil
in the hills the atmospheric density is low and therefore a lot of heat is lost to the atmosphere
n the hills the atmospheric pressure is lower than that in the plains and therefore water boils at a temperature lower than 100oC causing an increase in cooking time

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