1 The material is another important basis for computation of cost. 2  The material is usually computed by yard. 3  A couch on average uses from 18 to 22 yards of fabric. 4  Some fabrics cost as low as $15 per yard to as high as $180 for fabrics made of silk and wools. A couch on average uses from 18 to 22 yards of fabric. 2  Some fabrics cost as low as $15 per yard to as high as $180 for fabrics made of silk and wools. 3  Labor charges vary according to location and if the person doing it is a novice or professional for the job.
The major energy loss of high-energy (relativistic) electrons (energy greater than about 10 MeV, depending somewhat upon material) occurs from the emission of bremsstrahlung, and this is the major source of gamma rays in a high-energy cosmic-ray shower. See Electromagnetic radiation.
radiation: The photoelectric effect. The photoelectric effect is caused by the absorption of electromagnetic radiation and consists of electron ejection from a solid (or liquid) surface, usually of a metal, though nonmetals have also been studied.