Answer:
Radiometric dating
Explanation: Radiometric dating is a precise method of determining the age of archeological artifacts and rocks, it usually makes use of certain radio isotopes of Uranium-235,Rubidiun-87 etc.
Radiometric dating which is also known as radioactive dating is carried out by comparing the naturally occurring radioactive materials of the artifact or rock under study to product of its decay process.
Craters dating is a random process so its reliability can not be guaranteed.
Answer:
Because after the loss in Russia, he needed to retreat, and new coalition of European countries was created. After the battle of Leipzig in reign was practically finished.
Explanation:
After the Leipzig he retreated to France, and great forces decided to remove him from power. The was sent as a prisoner to island Elba. He spent some time there, before he escaped and recaptured the throne. He reigned again for 100 days, before finally being defeated in the battle of Waterloo.
Answer:
The greatest angle is
Explanation:
According to angle sum property of a triangle, sum of all the angles of a triangle is equal to °.
The given angles of a triangle are
Therefore,
°
°
°
≈ 87.2°
≈ 71.8°
≈ 20.9°
Therefore, greatest angle is
Answer:
The largest freshwater lake group is Superior with 31700 sq mi