T2 * relaxation refers to the decay of transverse magnetization seen with gradient-echo (GRE) sequences. T2 * relaxation is one of the main determinants of image contrast with GRE sequences and forms the basis for many magnetic resonance (MR) applications.2 * is shorter than T2 (Fig 1), and their relationship can be expressed by the following equation (3), where Î³ is the gyromagnetic ratio: 1/T2 * = 1/T2 + Î³ Î´B inhom, or 1/T2 * = 1/T2 + 1/T2â², where 1/T2â² = Î³ Î´B inhom, and Î´B inhom is the magnetic field inhomogeneity across a voxel.
Simpler answer: Energy used per day is measured in watt-hours, or more usually kilowatt-hours, and a typical house might use 35 kilowatt-hours per day. That is equal to 1.458 kilowatt-hours per hour, in other words an average power of 1.458 kilowatts.
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.