T2* can be considered an observed or effective T2, whereas the first T2 can be considered the natural or true T2 of the tissue being imaged. T2* is always less than or equal to T2. T2* results principally from inhomogeneities in the main magnetic field.These inhomogeneities may be the result of intrinsic defects in the magnet itself or from susceptibility-induced field distortions produced by the tissue or other materials placed within the field.2* can be considered an observed or effective T2, whereas the first T2 can be considered the natural or true T2 of the tissue being imaged. T2* is always less than or equal to T2. T2* results principally from inhomogeneities in the main magnetic field.
The average electricity consumption of a US family of four is in the neighborhood of 50 kWh per day, or 1,500 kWh per month. Similar figures apply for Canada. Assuming an average electricity cost of $0.12 per kWh, that translates into about $6 per day for electricity, or $180 per month.
(Then divide by 1000 to get the kilowatt-hours, which is how your utility charges you.) Example: 100-watt bulb x 2 hours 1000 = 0.2 kWh. Trivia. The average U.S. household uses 920 kWh a month. (Dept. of Energy). The U.S. as a whole used nearly 4 trillion kWh in 2009.(DoE) About 37% was residential use.or example, an all-electric (no gas) San Francisco household has baseline quantities of 11.1 for summer and 20.2 for winter. In a 31-day month, the baseline is 11.1 x 31 = 344 kWh for summer and 20.2 x 31 = 626 kWh for winter.