The stiffness of a particular spring is 730 N/m. One end of the spring is attached to a wall. When you pull on the other end of the spring and hold it stretched with a steady force of 133 N, the spring elongates to a total length of 79 cm. What was the relaxed length of the spring?

The relaxed length of spring was 61 cm

Explanation:

To solve this problem, we will use Hooke's Law. Hooke's law is stated as:

F = k Δx

F = k(x - x₀)

where,

F = Force applied to the spring = 133 N

k = Spring Constant = 730 N/m

x = Total Length after elongation = 79 cm = 0.79 m

x₀ = Initial or Relaxed Length of Spring = ?

Therefore,

133 N = (730 N/m)(0.79 m - x₀)

(0.79 m - x₀) = (133 N)/(730 N/m)

(0.79 m - x₀) = 0.18 m

x₀ = 0.79 m - 0.18 m

x₀ = 0.61 m = 61 cm

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

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