Water flows through a hose (pipe) whose internal diameter is 2 cm at a speed of 1 m/s. What should be the diameter of the nozzle if the water is to emerge at a speed of 4 m/s

Water flows through a hose (pipe) whose internal diameter is 2 cm at a

1.	Water flows through a hose (pipe) whose internal diameter is 2 cm at a speed of 1 m/s. What should be the diameter of the nozzle if the water is to emerge at a speed of 4 m/s
Answer» Solution :` a_1v_1 = a_2v_2 , pi r_1^(2) v_1= pi r_2^(2) v_2, 10 ^(-4) xx 1 = r_2^(2)xx 4, r_2= 10 ^(-2) //2M , D = 0.01m `