مكونات الغلاف الجوى: تأثير غاز النيتروجين على الأشياء

The video tutorial explains the properties of nitrogen, particularly its liquefaction at 77 Kelvin. It discusses the effects of liquid nitrogen on materials, making them brittle and easily breakable. Safety precautions are emphasized when handling liquid nitrogen. The video also explores alternative cooling methods using dry ice and acetone. Demonstrations include freezing grapes and banana peels to show how low temperatures affect materials.

At what temperature can nitrogen gas be liquefied?

• 77 Kelvin

• 0 Kelvin

• 100 Kelvin

• 273 Kelvin

What happens to a flower when it comes into contact with liquid nitrogen?

• It changes color

• It melts

• It becomes flexible

• It becomes solid and shatters

What is a safer alternative to liquid nitrogen for achieving similar effects?

• Solid hydrogen

• Liquid oxygen

• Dry ice with acetone

• Boiling water

What is dry ice composed of?

• Solid hydrogen

• Solid carbon dioxide

• Solid oxygen

• Solid nitrogen

What happens to grapes when exposed to low temperatures?

• They become soft

• They turn into liquid

• They become hard like marble

• They evaporate