If the roller coaster starts from rest at A and it's speed increases as a_t = (6 - 0.06s) m/s^2 determine the magnitude of its acceleration when it reaches B where s_B = 40 m.

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

Slip occurs via two partial dislocations because of (a) the shorter path of the partial dislocation lines; (b) the lower energy state through partial dislocations; (c) the charge balance.

Hydraulic fluid with a sg. of 0.78 is flowing through a 1.5 in. i.d. pipe at 58 gal/min. the fluid has an absolute viscosity of 11.8 x 105 lbf-sec/ft2. is the flow laminar, turbulent or within the critical range? give both a numerical reynolds number and a term answer.