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The activity of a radioactive sample decreases to one tenth of the original activity A_(0) in a period of one year further After further 9 years, its activity will be :

Geeta Publishing Pvt. Ltd. Publising books, is a very old company. All its business activities are conducted in a traditional manner. Recently, Mr. Sudheer Gupta was appointed as the Chief Executive Officer (CEO) of the company. He watched all the activities of the company from proximity. He noticed that the company was doing several activities which could be got done from outside at a less cost and in a much better way. He held a meeting of all the managers of the company and it was unanimously decided that the company would focus its attention only on the Core Specialisation Areas and for the remaining activities the services of the specialised companies from outside will be hired. This decision was implemented with immediate effect. (a) Which two concepts did Mr. Sudheer Gupta give effect to? (b) Give two examples each of the concepts indentified in (a).

The beta activity of 1 g of carbon made from green wood is 15.3 counts per minute. If the activity of 1 g of carbon derived from the wood of an Egyptian mummy case is 9.4 counts per minute under the same conditions, how old is the wood of the mummy case?

Two reactiosn of same order have equal pre-exponential factors but their activation energies differ by 41.9 J/mol. Calculte the ratios between rate constant of these reactions at 600 K

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A sample of radioactive material has an activity of 9xx10^(12) Becquerel. The material has a half life of 80s. How long will it take for the activity to falls to 2xx10^(10) Becquerel ?