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:

Explanation:

The three resistors are connected in parallel: this means that the potential difference across each resistor is the same as the voltage of the battery. This can be calculated using the information about the resistor: in fact, since we know its resistance and the current flowing through it (0.155 A), we can find the potential difference across this resistor, which is equal to the voltage of the battery:

We also know the total current in the circuit, 0.250 A. This means that we can find the total resistance of the circuit, using Ohm's law:

So now we now the total resistance and the resistance of two of the 3 resistors; therefore, we can find the resistance of the 3rd resistor: