Write any two applications of Bernoulli's Theorem.

Explanation

(a) Blowing off roofs during wind storm
(i) In olden days, the roofs of the huts or bouses were designed with a slope.
(ii) One Important scientific reason is that sa per the Bernoulli's principle, it will be safeguarded except roof during storm or cyclone.
(iii) During cyclonic condiion, the roof is blown off without damaging the other parts of the house.
(iv) In accordance with the Bernoull's principle, the high wind blowing over the roof creates a low-pressure `P_(1)`.
(v) The pressure under the roof `P_(2)` is greater. Therefore, this pressure difference (`P_(2) - P_(1))` creates an up thrust and the roof is blown off.
(b) Aerofoil lift
(i) The wings of an airplane (aerofoil) are so designed that its upper surface is more curved than the lower surface and the front edge is broader than the real adge.
(ii) As the aircraft moves, the air moves faster above the aerofoil than at the bottom.
(iii) According to Bernoulli's Principle, the pressure of air below is greater than above, which cerates an upthrust called the dynamic lift to the aircraft.