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.
The average household in the United States uses about 8,900 kilowatt-hours of electricity each year.. there are 9000 hours in a year. so 9e3 kwatt-hour/9e3 = about 1kw average usage, averaged over time, is 1000 watts. At 10Â¢ per kw-hr, that is 10Â¢ per hour, or $2.40 per day or $900 per year.urprisingly, the average person drives 37 miles per day, and the average car mpg in 2008 was 25 mpg, so that's about 1.5 gallons per person just on driving. This means a per household fuel usage of gas is likely double that, 3 gallons.