it was obsolete by the invention of the gun
Samurai armor made of steel plate sometimes leather. Early Samurai armor was made from brass.
Metal armor (plate armor) was not invented in medieval age, it was already used by ancient greeks and romans. Metal armor allowed knights to be stronger.
"white" armour is generally a term used by historians for highly polished steel plate armour. "plate" is a term which covers all steel plate armour - which could be painted, blued or blackened to prevent corrosion, or even covered in velvet or similar fabric - "white" armour is simply a subset of the larger group of plate armour finishes.
Heavy guns; cannons and mortars, replaced catapaults circa the 14th Century.
The Missouri Compromise was nullified by the new Compromise of 1850 - caused by the admission of California, which extended a long way on either side of the Missouri line, and rendered it obsolete.
No - Light armor is leather, cloth, etc. Plate armor is considered heavy armor.
Einstein's general theory of relativity rendered Newtonian gravity obsolete However, the rest of Newton's work is NOT obsolete and even with gravity his equations still work OK, it is the explanation for gravity that has changed.
Knights started wearing plate armor for better protection against arrows and weapons in battle. This armor increased their defense but also reduced their mobility. Additionally, plate armor allowed knights to display their status and wealth.
There is no such thing as dragonwarrior armor on runescape. If you mean dragon plate armor, you need to have level 60 defense to be able to wear it. Dragon plate armor has good defense bonuses, but it is a little expensive. To get dragon plate armor you can but it at the grand exchange or buy ir from players. Some monsters on runescape drop dragon armor but it is usually a rare drop.
In terms of protective quality in terms of blunt force and weight, the mail is still widely used, and it is apparent that there are numerous reasons for this. It is adaptable, allowing it to cover areas where a plate would be difficult to protect. The mail is often heavier than an armor plate in terms of material. Because mail and plate armor come in a variety of thicknesses, there's some leeway here. Plate mail armor is frequently backed with chain mail, with the metal plates welded to the chainmail backing.
Iron plate.
You cannot get the Lich King's armor. However, if you wish to get armor that looks similar, there is level 80 plate in Naxxramas that resembles Death Knight armor. Similarly, the pieces of Deathbone plate armor that drop in Scholomance (level 58-60) also have a similar style.
Some common types of armor used in medieval times are leather armor that has been treated by boiling or waxing, chain mail armor, plate armor and scale armor.
for protection
Samurai armor made of steel plate sometimes leather. Early Samurai armor was made from brass.
yes
A faceplate & chest plate.