ak74 don't penetrate walls.this happens if only the wall is weak,wearing out,old or not a real wall.walls are usually hard and thick.the bullet is capable of boring holes in the wall not making it porous just like the ak47.
Yes, microwave waves can penetrate through brick walls.
no
Yes, radiation has the ability to penetrate through walls depending on the type and energy level of the radiation.
Yes, probably.
Photographs can't... infrared is a possibility.
Allows it to penetrate more walls, and does a little more damage
infrared
Yes, anthough this will greatly decrease the range of the signal.
It means the person is alone and that he does not let anyone get close to him.
Dog whistles are not effective in communicating with dogs through walls because the sound waves produced by the whistle are not able to penetrate solid barriers like walls.
The AK47 was invented by Mr.Kalishnakov, In the Soviet Union.
there is no ak47 in bad company 2.