So i understand vectors but this -4.8 a is throwing me off, im not sure what it is asking.
the magnitude of vectorarightharpoonhead. gifis 5.9 m. it points in a direction which makes an angle of 145° measured counterclockwise from the positive x-axis.
(a)
what is the x component of the vector −4.8arightharpoonhead. gif?
m
(b)
what is the y component of the vector −4.8arightharpoonhead. gif?
m
(c)
what is the magnitude of the vector −4.8arightharpoonhead. gif?
m

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.