Answer :

(a) True

When the air is filled inside the balloon the pressure inside the balloon increases and the balloon becomes spherical and exerts equal pressure in all directions in order to balance the atmospheric pressure. Figure below illustrates the following.

(b) True

In order to make the pressure equal both sides the fluids always flows from the higher pressure to lower pressure( this makes pressure difference equal to zero), once the pressure becomes equal both sides the flow of the fluid stops. Therefore the above statement is True.

(c) False

As we know that ;

Hence we can see from above formula that pressure depends on the surface area () that means,

Hence less is the surface area, the greater is the pressure produced.

Therefore the above statement is False.

(d) True

When we stand on a cane chair the area of contact (surface area)with the chair is less , hence the pressure exerted on the chair due to the weight is more . And this increased pressure increases the possibility of breaking the cane chair due to more force.

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