With an average acceleration of -1.2 m/s squared, how long will it take a cyclist to bring a bicycle with an initial speed of 6.5 m/s to a complete stop

a) 2.0 seconds
b) 5.4 seconds
c) 0.18 seconds
d) -1.8 seconds

Which transition by an electron will release the greatest amount of energy? oa ob oc od

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.

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.