Q2. Give reasons
(a) Snow shoes stop you from sinking into show
(b) Wide steel belt is provided over the wheels of an army tank
(c) Mountaineers usually suffer from nose-bleeding at high altitudes.
Answers
Snow shoes stop from sinking into snow because the snow shoes are very large.They have large surface area. ... So when the surface area is large than the pressure exerted by the shoes will be less on ground. Thus due to this person will not sink into snow.
A wide steel belt is provided over the wheels of army tank because, we know P = F/A. So we provide a larger surface area which causes the pressure of the tank on the ground to decrease, allowing it to move easily and not sink into the ground.
As the altitude increases the atmospheric pressure decrease. And the air becomes thinner and there will be very less oxygen at high altitude. So due to which the blood vessels present inside our their nose bursts and starts bleeding. This is why mountaineers suffer from nose bleeding!