Why is the sky Blue?

I need More than one answer

How many liters of ethylene glycol antifreeze (c2h6o2), with a density of 1.100 g/l, would you add to your car radiator containing 15.0 kg of water if you needed to protect your engine to - 21.5°c? for water, kf = 1.86°c m -1.

Most metamorphosis processes take place

What type of radiation is lead emitting in the following equation? alpha particles beta particles gamma rays