$A$ Venturimeter is used to:

Rank in order, from highest to lowest, the liquid heights $h_a$ to $h_d$. The air flow is from left to right. The liquid columns are not drawn to scale.

What is an aerofoil? Explain.

In old age,arteries carrying blood in the human body become narrow,resulting in an increase in blood pressure. This follows from:

Which types of energies are present in the streamline flow of an ideal fluid?

$Assertion :$ The velocity of flow of a liquid is smaller when pressure is larger and vice-versa.
$Reason :$ According to Bernoulli's theorem,for the stream line flow of an ideal liquid,the total energy per unit mass remains constant.