To withstand the external pressure.
To withstand high water pressure when they are submerged at sea.
Because they need to be able to withstand the pressure of the seawater outside. The deeper a submarine goes - the higher the pressure gets.
As a submarine submerges, it is subjected to a high volume of water pressure, which increases the further in depth the submarine goes. They have to be built to be able to withstand this pressure.
Graphite is not a metal! It is a crystalline form of carbon in single atom thick sheets.
a thick sheet of ice
a thick sheet of ice
The two terms are used interchangeably, although plates may be considered somewhat thicker (anything above 1/4 inch thick) than sheets (anything less than 1/4 inch).
built from redwood, tule, animal skin, sheets of tree bark, tree saplings, thick brush grass and other natural recources.
90
gamma rays
Yes. Aluminium is a metal and a very malleable (can be hammered into sheets) metal as well. To prove this, 'tin' foil used to wrap food for cooking (like 'Bacofoil') is actually made from aluminum and not tin. The most malleable metal is gold - it can be hammered into thin 'gold leaf' sheets that can be so thin that they are just a few atoms thick. Aluminium is not as malleable as this, but it can easily be made into foil.
Thick sheets of ice that can cover large areas of a continent are called continental glaciers or ice caps. Examples of continental glaciers are in Antarctica and Greenland The ice sheets that form in these two locations are up to 3500 meters thick. thank you a lot