Ballast
If the ballast underneath the tracks have sunk then it will go up down up down under each locomotive.
The gravel under and around the ties is called ballast.
No.
Wherever they want the train to go. Or under the wheels.
There is nothing that is specifically designed to keep the air pressure low under a train. A train is kept on the tracks by gravity, nothing more.
these have small stones under them so that the rails will not bend, also when it rains these rails wont sink in the mud and the water will filter through them.
yes but u would fall... and die... a horrible death so dont do it
Invar steel is used for train tracks because it has a low coefficient of thermal expansion, meaning it does not expand or contract much with temperature changes. This helps to maintain the stability and alignment of the tracks under different weather conditions, reducing the risk of buckling or warping.
There are under the gravel filters, hang on filters and canister filters. There are also reactors that can be used for filtration. Under gravel filters are actually under the gravel in your tank and use a air pump to create suction to pull dirt and debris down into the gravel trapping it there. A gravel cleaner, sometimes referred to a gravel filter is generally a plastic tube attached to a length of hose that uses siphoning to draw dirt, debris and water out of tank into a drain or holding container to be disposed of.
When a road is constructed, 12 inch layers of gravel are laid and compacted until the road bed reaches the desired height. There are no braces other than a bed of compacted gravel.
The gravel acts as a drain in wet areas.