Question

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Answer 1

Astronauts wear specially designed clothes

• This is because, in space there isn't any oxygen for them to breathe.
• Space is just vaccum (meaning nothing is present there), hence without gravity it would be difficult for them to move.
• To provide them with oxygen and to support their movement astronauts wear specially designed clothes called space suits.

As mountaineers climb higher altitudes there is a possibility for nasal bleeding.

• Nasal bleeding refers to nose bleeding
• Mountaineers experience this due to the pressure difference.
• Atmosphere exerts a pressure on us known as atmospheric pressure.
• Our body does not get crushed by this pressure, as it exerts a pressure too
• As we move higher the pressure exerted by the atmosphere decreases. (as the gases with less mass are present there, hence the pressure exerted by them is lesser)
• When we move higher, the atmospheric pressure decreases but the pressure exerted by our body is the same. Hence this pressure difference can cause nasal bleeding

Rubber attachers

• Rubber attachers work on pressure
• Pressure is the force acting on a unit area
• When the rubber attachers is stuck to the ground, the air inside the rubber attachers would have already escaped.
• Hence there is more pressure outside the rubber attacher than inside it.
• The atmospheric pressure outside the rubber attacher pushes the object more to the surface making it stick very strongly to it.

Hope it helps

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