Answer: Carbon 14 and Uranium 238 are not used together to determine fossil ages.
Explanation:
Carbon 14 with a half life of 5,700 years can only be used to date fossils of approximately 50,000 years. Most fossils are thought to be much older than 50,000 years. Also most fossils no longer contain any Carbon. The fossilized remains have been mineralized where the original organic material has been replaced and turned into stones containing no carbon.
Uranium 238 has a half life of 4.5 billion years. Uranium can be used to date the age of the earth. If 50% of pure uranium' is left in a sample the sample is assumed to be 4.5 billion years old.( This is assuming that the original sample was 100% uranium and no Uranium 238 has been eroded or lost in 4.5 billion years old. If a fossil has only 25 % of the Uranium 238 the sample has an estimated age of 3.2 Billion years. This would be the estimated age of the earliest life or formation of fossils.
Note no fossils contain Uranium 238. Uranium 238 is only found in igneous or volcanic rocks. So no fossils can be dated directly using U 238.
Because of the huge differences in the half lives of Carbon 14 and Uranium238 they cannot be used together. Carbon 14 can only be used to date fossils of a very recent age. Uranium 238 can only be used to date volcanic rocks of a very old age.
1900 millimeters thats wht i got
The principal reason voltage is
induced in the loops of a generator coil is that the loops are rotating,
changing the amount of magnetic field within the loops. The answer is letter A.
For example, in a circuit, the electrons in
the bulb will not move without the potential difference or voltage. When there
is voltage, electric current occurs because there is a driving force for the
electrons in the wire to move.
Answer
According to prevailing gender stereotypes most important characteristics associated with men and woman are as follows
1. Domestic behaviors is one of the basic stereotypes. Some people have thinking that women will cook for family, she will take care of the children, she will do loundary and will clean the house. About man they thought he will take care of finances, will pay the bills and do the home repairs.
2. Some people thought that women are emotional and submissive, while men are thought to be self-confident and aggressive.
3.Some people thought that the most common occupation for women are teaching and nursing while the rest of the occupation are for men like pilots, doctors, and engineers are men.
4. Men are expected to be tall and strong while women are expected to be thin and graceful, while.
5. Dressing of men and women also thought to be different. Usually men expected to wear pants and short hairstyles whele women are expected to wear goun, frouks and make-up.