Ahanging spring stretches by 35.0 cm when an object of mass 450 g is hung on it at rest. in this situation, we define its position as x = 0. the object is pulled down an additional 18.0 cm and released from rest to oscillate without friction. what is its position x at a moment 84.4 slater?

- 0.153 m

Explanation:

mass, m = 450 g = 0.45 kg

length of the spring, l = 35 cm = 0.35 m

additional stretch, A = 18 cm = 0.18 m

Let ω  be the angular frequency and A be the amplitude and k be the spring constant.

F = mg = k l

k = 12.6 N/m

ω  = 5.29 rad/s

Use the equation of oscillations

x = A Cosωt

x = 0.18 Cos 5.29 t

Put, t = 84.4 s

x = 0.18 Cos (52.9 x 84.4)

x = - 0.153 m

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

it would be c. predictability