Aliquid of density 1230 kg/m3 flows steadily through a pipe of varying diameter and height. at location 1 along the pipe, the flow speed is 9.39 m/s and the pipe diameter d1 is 11.5 cm. at location 2, the pipe diameter d2 is 15.3 cm. at location 1, the pipe is δy=9.59 m higher than it is at location 2. ignoring viscosity, calculate the difference δp between the fluid pressure at location 2 and the fluid pressure at location 1.

To develop this problem it is necessary to use the continuity equations and Bernoullie's theorem.

It is known from Bernoullie's theorem that

Where

P = Pressure

g = Gravity

h= Height

v = Velocity

= Density

On the other hand we have that the continuity equation is given by

Where A is the Cross-sectional area and v the velocity.

For our values we know that

Using Bernoulli's expression we can now find the pressure difference,

d.7.5cm is your answer

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.