The car travels around the portion of a circular track having a radius of r = 500 ft such that when it is at point a it has a velocity of 4 ft/s , which is increasing at the rate of v˙=(0.004t)ft/s2, where t is in seconds. a-determine the magnitude of the velocity when it has traveled three-fourths the way around the track. b-determine the magnitude of the acceleration when it has traveled three-fourths the way around the track.

To design a steam turbine to produce 12,000 hp power. a engineer comsiders using a steady state stean low st 1160fr and engineer considers using a steady state steam flow at 1160°r and 450 psia to drive this steam turbine. the exhaust of the steam is cooled by the lake (vacuum). heat losing to the surroundings is measured at a rate of 555.55 btu/s. (a) sketch the system with the given conditions. (b) neglecting kinetic and potential energy changes from inlet to exit, determine the volumetric flow rate of the steam at the inlet, (ft'/hr). must clearly show unit conversions at crtical terms.