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.
With a sequential manual transmissionâa manual transmission minus a clutch pedal, controlled through two paddle shifters on either side of the steering wheel, one shifter for up and one for downâFerrariâs 360 Modena, the car that the F430 is replacing, costs about $177,000.ndeed, the F430 develops 490 hp at a whopping 8,500 rpm. What does this mean in terms of the driving experience? Well, for those who have never driven a Ferrari before, the engine starts at low speeds by making the sort of deep growl you expect from a race car.