Q8. Correct Bernoulli's equation is (symbols have their usual meaning) :\\
(1) $P + m g h + \frac { 1 } { 2 } m v ^ { 2 } =$ constant\\
(2) $P + \rho g h + \frac { 1 } { 2 } \rho v ^ { 2 } =$ constant\\
(3) $P + \rho g h + \rho v ^ { 2 } =$ constant\\
(4) $P + \frac { 1 } { 2 } \rho g h + \frac { 1 } { 2 } \rho v ^ { 2 } =$ constant