A water line with an internal radius of 6.5 x 10⁻³ m is connected to a shower head that has 12 holes. The speed of the water in the line is 1.2 m/s.
(a) what is the volume flow rate in the line?
(b) At what speed does the water leave one of the holes (effective radius of = 4.6 x 10⁻⁴ m) in the head?
Give your answers in order to three 3 significant digits with the proper units.

a) , b)

Explanation:

a) The volume flow rate in the line is:

b) The speed of the water leaving one of the holes are:

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

no sign of dia of fuel cell