<span><span> V = d/ t
</span><span> t = v/d
-> 2.00 * 10 ^ 10 s
divide by 3600 and by 24 to get days
->232414 days
divide by no of days in a year
giving 636 years approx. </span></span>
The correct answer is - D. It is impossible to dig through the ice on Antarctica.
Even though the technology is much more advanced nowadays than in the past, the extraction of the numerous natural resources from Antarctica is still pretty much impossible because of the ice cover over the continent.
On average, the ice is around 2 km thick on top of the landmass. Considering the fact that in order to get to the resources, the people will have to dig even more into the ground after they manage to break through the ice, makes it almost impossible, and not to mention economically unjustifiable.
Radioactive isotopes (also called radioisotopes<span>) have unstable nuclei. These isotopes disintegrate to form atoms with stable nuclei by the release of subatomic particles and </span>gamma rays<span> (akin to X-rays). The radioactive elements are referred to as parents atoms; the atoms they disintegrate to form are called daughter products.
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The similarity between the Soviet and market economy farming systems can be seen in the fact that in both of the systems, the farming is on a large scale, with huge properties, based on one particular product that is required by the market. In the Soviet system there has been collective farming, focused on what the government has planed to be produced. In the market economy system it's the corporations that control the production of a specific product that they require and need.
