When a pitcher throws a baseball, it reaches a top speed of 42 m/s. If the baseball takes 2 seconds to travel from the pitcher to the catcher, what is its acceleration? (Assume the ball is moving at O m/s right before it leaves the pitcher's hand.) O A. 15 m/s2 O m B. 48 m/s2 O c. 36 m/s D. 21 m/s2 SUBMIT​

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.

Ain is , is 's of ? 0.62 0.79 1.27 1.50

Awave with a frequency of 500 hz is traveling at a speed of 100 m/s.what is the wavelength?