Adamped harmonic oscillator consists of a mass on a spring, with a damping force proportional to the speed of the block. if the spring constant is 350 n/m, the mass of the block is 240 g, the damping constant is 0.41 kg/s, and the block is displaced 7.5 cm from its equilibrium position and then released, what is its kinetic energy after one cycle?

Explanation:

Given:

Now the frequency of damped oscillation is given as:

Now time period of one oscillation:

We know the equation of motion for the damped harmonic motion of a mass attached to a spring is given as:

........................(1)

From above we find the position of the mass:

is the position after 1 cycle.

So, the Kinetic energy can be given as:

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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