Write Bernoulli’s principle in word.
A steel wire is suspended vertically from a rigid support. When loaded with a weight in air, it extends by $l_a$ and when the weight is immersed completely in water, the extension is reduced to $l_w$. Then the relative density of material of the weight is
A tube is attached as shown in closed vessel containing water. The velocity of water coming out from a small hole is :
What is a venturi-meter ? Explain its construction and working.
An $L-$ shaped glass tube is just immersed in flowing water towards tube as shown. If speed of water current is $V,$ then the height $h$ upto which water rises will be