What should be done to reduce pressure on children's shoulder caused by school bag straps ?
Wide
Pressure equals force divided by area; making the strap wide increases the contact area on the shoulder, which reduces the pressure for the same weight of the bag.
Deep-sea diving vessels have to withstand pressure from the crushing effect of seawater acting-
The pressure increases with-
The pressure exerted by man on the earth is minimum when he __________.
The atmospheric pressure at sea level is ________, and is taken as the normal atmospheric pressure.