Read the following hypothesis about why a chicken bone becomes bendy after being soaked in vinegar:

the bone can bend because the acid in the vinegar has removed the calcium that made it hard.
what prediction could be made based on this hypothesis?

a.
an acidic substance like many drinks wouldn't make bones bendy.

b.
acids are very powerful substances and should be handled with care.

c.
other kinds of bones containing calcium wouldn't get bendy in the vinegar.

d.
if the acid was separated from the vinegar, chicken bones wouldn't become bendy in the remaining vinegar.

iron would move it is magnetic there is a mag field around the current in the wire

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's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me