life in the cambrian period

The time required for the decay of the radioactive element to one half of its original amount is called Half-Life Period..

The time required for the decay of the radioactive element to one half of its original amount is called Half-Life Period . It is denoted by t 1 / 2 . Putting these values in equation (iii), we get ..

Half-life is the time period during which half the number of atoms present initially in the sample of radioactive element decays. When t = T ; N = N o /2 The radioactive decay of radium is 1,620 years. The time required to reduce a given quantity of that element by ha..

The rate of decay of carbon-14 which has a half-life period of 5,750 years is => 410.71 or 0.0012 or 0.00012 or 0.5234..

Introduction - Earth is an abundant source of materials. The air we breathe, the water we drink, stones and rocks, almost everything that is around us, are all useful to man for some purpose or the other. Gaseous materials like Oxygen, Nitrogen and Carbon dioxide are found in the atmosphere. Common..

The evolutionary process has developed over millions of years. Lineages evolved and split and modifications occurred gradually in stages. Life has been in existence on Earth for at least 3.5 billion years but the first two stages of evolution took place in the space of a billion years! T..

Growth in all higher animals including man, follow a specific rate and rhythm of growth, and stops long before death. The rate of growth is not uniform throughout life. If varies during different periods of life..

It is the development of breast tissue in males, and is usually due 5o perturbation of estrogen to androgen ratio. In the neonatal period and during puberty, gynaecomastia is due to temporary increase in circulating estrogen. Decreased testosterone in later life may also lead t..

Oxygen, sulphur, selenium, tellurium and polonium constitute the group 16 of the periodic table of elements. The first four elements are collectively called CHALCOGENS. The name derives from the Greek word for bronze and points to the association of sulphur and its congeners with co..

Maximum yield of eggs is obtained by keeping the poultry in comfortable, well ventilated, dry, clean and properly lighted houses. Birds of different ages should be kept separately. The first phase in the life of poultry is called the growing period and the chickens are called gr..