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.
Mercedes-Benz Airscarf â Mercedes-Benz E350 Convertible, $3,270*. The best part about owning a convertible is enjoying motoring in the open air, wind tousling your hair, the warm breeze on your neck. The worst part, at least for much of the country, is not being able to use that top-down feature for much of the year.