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.
The average cost for a Subaru Impreza WRX STI Clutch Replacement is between $1103 and $1643. Labor costs are estimated between $651 and $822 while parts are priced between $452 and $821. Estimate does not include taxes and fees.