A car, initially traveling 14.0m/s speeds up at a rate of 3.00m/s2. Determine all unknowns and answer the following questions.
What was the car's final speed?
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How far did the car travel during this time?
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Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.

What is "decrease in velocity" i need offering 60 !

What is reflection, what is refraction, and what is diffraction. what some similarities or differences between the three.