In the seventeenth century, robert hooke conducted many experiments with springs. in all the data he recorded, he found that the force needed to push down on a spring or stretch it out from its usual resting point was equal to the spring’s stiffness multiplied by the distance it is pushed or pulled from its resting point. he wrote the equation f = kx, in which f is the force, k is the spring’s stiffness, and x is the distance the end of the spring moves from its usual resting point when no push or pull is applied. the equation is still used today.

which best describes hooke’s equation?

a) it is a law, because it explains why a force must be applied to push or pull a spring.

b) it is a law, because it states how force relates to a spring but does not explain why.

c)it is a theory, because it explains why a force must be applied to push or pull a spring.

d)it is a theory, because it states how force relates to a spring but does not explain why.

B) It is a law, because it states how force relates to a spring but does not explain why.

Explanation:

As we know that Law is defined as the hypothesis which is experimentally verified. This law is converted into theory if we can prove it mathematically with a given theory.

So here we know that in spring force calculation we obtained a relation that if spring is compressed or expanded by some distance "x" then the spring force on it will be proportional to that distance.

Since there is only experimental verification is available for this hypothesis so it must be defined as law.

so here correct answer will be

B) It is a law, because it states how force relates to a spring but does not explain why.

the higher the current the higher the mag field around it the higher the influence on the compass

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