The stress across a surface element (yellow disk) is the force that the material on one side (top ball) exerts on the material on the other side (bottom ball), divided by the area of the surface.
Overview. The WR450F retails for $8,290, making it the sixth-most expensive 450cc 4-stroke enduro bike of 2013. It comes equipped with a 449cc engine, which is slightly larger than average for a 4-stroke motor.he WR450F retails for $8,290, making it the sixth-most expensive 450cc 4-stroke enduro bike of 2013.
An HP 80x cartridge costs $187.99 (as of 05/10/2017) and the Canon PGI-250XL cartridge currently costs around $45.98. Although the HP toner is priced 75% more than the Canon cartridge, since you get 92% more pages out of the toner, the HP laser cartridge has a more economical cost per page.