Which one of the following characterises the cold weather season in India? (a) Warm days and warm nights

Correct answer (b) unburnt carbon particles or hydrocarbons suspended in air

Anything that occupies space and has mass is called matter. Matter can exist in three physical states—solid, liquid, and gaseous.  Chair and almond are forms of matter in the solid state.  Cold...

The temperature ranges between 10°-15°C in the northern plains. The weather is usually marked by clear sky, low temperatures and low humidity and feeble variable winds. The inflow of the...

(b) air trapped between the layers of newspaper is a bad conductor of heat. 

(c) Cool days and cold nights

The temperature ranges between 10°-15°C in the northern plains. The weather is usually marked by clear sky, low temperatures and low humidity and feeble variable winds. The inflow of the...

B alone finish work in x days A alone work in x - 5 A one day works= 1/(x-5) and B one day works = 1/x A+B one day work = 1/6 so, 1/(x-5)...

(e) Required number of days = 6x12 /6+12 = 4 days

Yes, I have noticed it. I think to protect themselves from cold, they shift to some safe and conductive place.