Beta-plus (Î² +) radiation is the emission of positrons, which are the antimatter form of electrons. When a positron slows to speeds similar to those of electrons in the material, the positron will annihilate an electron, releasing two gamma photons of 511 keV in the process.
The Congressional Budget Office puts the cut-off lower, at $347,000 in 2007, or $252,000 after subtracting federal taxes and adding back transfers. Measured by net worth, rather than income, the top 1% started at $6.9m in 2009, according to the Federal Reserve, down 23% from 2007.
US Average Hourly Earnings is at a current level of 25.69, up from 25.61 last month. This represents a monthly annualized growth rate of 3.75%, compared to a long term average annualized growth rate of 2.40%. 1  Category: Hours and Wages.  Region: United States.