Answer:
2.62 years
Explanation:
The half life of a material is the time taken for half of the number of radioactive atoms in a radioactive material to remain.
If a radioactive material is cut into pieces, each piece has the same half life as the whole material.
Hence, if Strontium-147 is cut into pieces, each piece will have a half life of 2.62 years, just as the whole material.
The solutions to environmental problems are “coordination of environmental efforts between sectors”, “enforcement of environmental regulations”, “sustainable land management practices”.
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The environmental problems in any region can be a threat to that region since it may affect their health to a greater extent. In order to eradicate any environmental problem in a region there must be a good coordination existing between sectors which will result in solving an environmental problem easily and quickly.
Strict enforcement of environmental regulation acts and policies also plays a major role in solving the environmental problems. Land management practices are those that combine the land management, water bio diversity and other resources in environment for meeting the needs of human beings.
The ozone is an important feature which blocks out the radiation
