What is the “lag of seasons”? a) the time it takes for one season to end and a new one to begin b) the delay in the time it takes for people to feel like a new season has begun c) the delay in time between the longest and shortest days of the year and when it feels hottest or coolest outside

Apulley with a mechanical advantage of 5 will require you to pull times the amount of rope. a. 1/5 b. 5 c. 10 d. 15

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.

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?