Erosion, caused by the number of people using it.
yes becuase sensors detect a train coming and wich that makes the railway boom go down too stop trafic
In simple terms, cable stayed use less cables then a suspension bridge. They are a combination of both beam and suspension. Suspension bridges hold the "deck" (where vehicles cross), via the cables, hence the term "suspension"; whereas, a cable stayed has the deck connected via the cables to anchorage points.
The international space station makes use of solar power.
Truss bridges are made up of triangles which are quite stable since all loads are carried mostly in tension/compression and not bending. Long members may not be stablebecause of buckling in compression, butt most truss designs will account for that.
The Arch was invented by the Romans. It makes a very sturdy construction, while making it lighter, and using less materials than the standard way of building. The weight of the story above resting on the top of the arch is transferred down each leg to the ground, instead of pressing on the lower story. The Arch is also what makes a Dome. Just think of 360 arches running through a common point at the top. The entire weight of the Dome is transferred to the walls of the building, and down into the ground.
Any step or path will wear due to the constant passage of feet over a long time. The rate of wear can be slowed by covering the steps with a hard-wearing non-slip coating.
the cements,bricks and glasses makes bridges towers strong
Because tower bridges have a big base
the same mineral that makes steel.
engineers engineers
Tempurature makes sound travel slowly. If it is cold outside sound travels slowly and if it is hot outside sound travels quickly.
It makes them fall.
Weak battery
it makes it tight
civil engineer
Walls, doors, windows and a floor generally. That's what makes up a police station. They vary in height and square footage.
Merlin10 it makes your health regerate slowly