? more free points ?

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

Water is siphoned from a large tank and discharges into the atmosphere through a 50-mm diameter tube. the end of the tube is b = 2.1 m below the tank bottom which is a = 7.4 m deep, and viscous effects are negligible. determine the maximum height h over which the water can be siphoned without cavitation occurring. atmospheric pressure is 101.4 kpa, and the water vapor pressure is 1.79 kpa (absolute)

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?