The statement that describes a chain reaction brought about by a nuclear reaction is "neutrons <span>released during a fission reaction cause other nuclei to split." This is applicable to fission reactions only wherein atoms split and produce neutrons that also cause further atoms to split, thus creating a chain or series of reactions.</span>
The rules of writing name is that they start with a big letter LIKE this and ends like this
Alfred Wegener
Explanation:
Alfred Wegener in 1912, proposed the theory of continental drift from his careful studies of different land masses. From his observations, he suggested the following:
- Some fossils of tropical plants were found in polar and temperate regions.
- Fossils of mesosaurus were found in South America and South Africa now separated by the Atlantic ocean.
- He fitted the continents into a giant land mass puzzles.
- Coal beds in Europe were similar to those in United States.
- Mountain chains in the edge of West Africa was similar to that of Eastern part of South America.
His theory lacked a mechanism which facilitated the plate movement.
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Isotopes are atoms of different elements which have the same mass.
Answer :
(a)
(b)
(c)
Explanation:
(a) cm/min to in/s
The conversion factor used :
and,
So,
Thus,
(b)
The conversion factor used :
Thus,
(c)
The conversion factor used :
and,
So,
Thus,