Isolated Systems. For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision.That is, the momentum lost by object 1 is equal to the momentum gained by object 2. force that originates from a source other than the two objects of the system a force that is not balanced by other forces. A system in which the only forces that contribute to the momentum change of an individual object are the forces acting between the objects themselves can be considered an isolated system.
Definition of 'Beta' Definition: Beta is a numeric value that measures the fluctuations of a stock to changes in the overall stock market. Description: Beta measures the responsiveness of a stock's price to changes in the overall stock market.
In finance, the beta (Î² or beta coefficient) of an investment indicates whether the investment is more or less volatile than the market as a whole. In general, a beta less than 1 indicates that the investment is less volatile than the market, while a beta more than 1 indicates that the investment is more volatile than the market. Volatility is measured as the fluctuation of the price around the mean: the standard deviation.