Water flows straight down from an open faucet. the cross-sectional area of the faucet is 2.4 × 10-4m2 and the speed of the water is 0.80 m/s as it leaves the faucet. ignoring air resistance, find the cross-sectional area of the water stream at a point 0.11 m below the faucet.

To solve this problem it is necessary to apply the continuity equations in the fluid and the kinematic equation for the description of the displacement, velocity and acceleration.

By definition the movement of the Fluid under the terms of Speed, acceleration and displacement is,

Where,

Velocity in each state

g= Gravity

h = Height

Our values are given as,

Replacing at the kinetic equation to find we have,

Applying the concepts of continuity,

We need to find A_2 then,

So the cross sectional area of the water stream at a point 0.11 m below the faucet is

Therefore the cross-sectional area of the water stream at a point 0.11 m below the faucet is

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electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia