Out of the choices given, enemy nations using sophisticated warfare to overpower the outdated tactics of the empire brought an end to the great West African empire. The correct answer is C.
While some might be familiar, nature provides us with about nine million distinct species (although only 1.5 million have been identified). Beauty is not limited to the hundreds of animals that most people can readily identify. Some fun facts will be provided about each of the ten animals.
The right answer is Half-life.
Half-life is the time taken by a substance (molecule, drug or other) to lose half of its pharmacological or physiological activity. Used by extension in the field of radioactivity, the half-life, also called radioactive half-life, is the time at which half of the radioactive nuclei of a source have disintegrated.
<span>The term half-life is often misinterpreted: two half-lives do not correspond to the full life of the product. The half-life is in fact the median of the life of a product, that is to say the duration below which there remains more than 50% of the product, and beyond which there remains less than 50%.</span>
