yes
Mobile phone, or Wall phone?
No, it's utterly useless.
In wall speaker wire is useful, as it hides the wires from sight. When a surround sound system is installed, it can lead to a number of unsightly wires appearing around the room. In wall wires hide this problem.
Without the cell wall, the bacteria will be susceptible to destruction by chemicals outside the plasma membrane (which is just inside the cell wall of bacteria), and it will not be able to survive.
Wood is the main material used in manufacturing a wall cabinet. Paint, wood stains, screws, bolts, hinges, etc are also useful in manufacturing a wall cabinet.
It is more useful to use a stand for a flat screen TV. If a flat screen is hung up you will have to go through the trouble of mounting it and possibly damaging the wall opposed to just sitting it on a table or stand.
A wall chaser is a special tool used by construction workers to cut down narrow edges on walls. It is a power tool that is useful when laying electrical cables.
The wall brackets can be extremly helpful if your trying to mount a large tv that you have. It can also help eliminate space if you don't want to get a large tv stand.
A sledge hammer would be helpful.
A cross section of a wall is a vertical or horizontal slice that reveals the internal structure and composition of the wall. It typically shows the layers of materials used, such as drywall, insulation, studs, and any finishes applied. This view helps in understanding how the wall is constructed and can be useful for design, renovation, or inspection purposes.
Of Course it was, else people wouldn't have put the effort in it to upgrade it for centuries and centuries...
A buttress is most often useful in architectural structures where a brick or masonry wall needs reinforcing strength. The most common circumstance would be a corner exterior wall.