Overview. Beryllium is the lightest member of the alkaline earth metals family. These metals make up Group 2 (IIA) of the periodic table. They include beryllium, magnesium, calcium, strontium, barium, and radium.Elements in the same column of the periodic table have similar chemical properties.eryllium is the lightest member of the alkaline earth metals family. These metals make up Group 2 (IIA) of the periodic table.
Definition 1: EER, energy efficiency ratio: Is the measure of air conditioner efficiency at maximum air conditioning load. It is measured by ratio of Btu/hour of cooling or heating load, to watts of electrical power input. The unit is in Btu hr-1 W-1. Definition 2: SEER, seasonal energy efficiency ratio: The measurement units of SEER is exactly the same as EER, but the difference lies in the data used for the measurement. Values for SEER, is determined through averaging readings of different air conditions, to represent air conditioner efficiency throughout the season.
IRR is the annualized implied discount rate calculated from a series of cash flows. It is the return that equates the present value of all invested capital in an investment to the present value of all returns, or the discount rate that will provide a net present value of all cash flows equal to zero.alculation. Internal Rate of Return (IRR) provides a measure of the growth of a portfolio in absolute terms; it is the single rate of return that makes everything you put into the investment equal to everything you took out.