Price to Earnings Ratio: Arriving at a price to earnings ratio is not easy. There are a lot of factors that play into what the public is willing to pay for the earnings of a company. Those of us who have seen the prototypes know that this product could be insanely popular. ( I think it could make 50% of televisions & computer screens obsolete.
Half-life is defined as the time it takes for one half of a radioactive element to decay into a daughter isotope. As radioactive isotopes of elements decay, they lose their radio activity and become a brand new element known as a daughter isotope.
Not all of the atoms of a radioisotope decay at the same time, but they decay at a rate that is characteristic to the isotope. The rate of decay is a fixed rate called a half-life. The half-life of a radioisotope describes how long it takes for half of the atoms in a given mass to decay.Some isotopes decay very rapidly and, therefore, have a high specific activity. Others decay at a much slower rate.he rate of decay is a fixed rate called a half-life. The half-life of a radioisotope describes how long it takes for half of the atoms in a given mass to decay. Some isotopes decay very rapidly and, therefore, have a high specific activity.