Water at its freezing point (ti, pi) completely fills a strong steel container. the temperature is reduced to tr at constant volume, with the pressure rising to pf (a) show that the fraction y of water that freezes is given by v-v (b) state explicitly the simplifying assumptions that must be made in order that y may be written v" [2"(t,- t) - "(p,- p) i= 0°c, 1.01 x 105 pa; f= -5°c b"67 x 10-6 k-1; k" = 12.04 x 10-1" pa-; v- vf= -1.02 x 10-4 m3/kg. 5.98 x 107 pa

Which of the following statements is true about women and minorities in early psychology? a. in the early 20th century, numerous graduate schools recruited women and minorities to study psychology. b. opportunities in higher education were limited for women and minorities in the early 20th century due to discrimination. c. despite some obstacles, there were numerous employment opportunities for women and minorities. d. women and minorities were often selected to do academic research in an effort to make the field more diverse.

Steam is generated in a boiler of a cogeneration plant at 10 mpa and 450°c at a steady rate of 5 kg/s. in normal operation, steam expands in a turbine to a pressure of 0.5 mpa and is then routed to the process heater, where it supplies the process heat. steam leaves the process heater as a saturated liquid and is pumped to the boiler pressure. in this mode, no steam passes through a condenser, which operates at 20 kpa. (a) determine the power produced in the turbine and the rate at which process heat is supplied in this mode. (b) determine the power produced in the turbine and the rate of process heat supplied if only 60 percent of the steam is routed to the process heater and the remainder is expanded to the condenser pressure. (3.32 mw; 9.69 mw; 4.25 mw; 5.82 mw)

Amira pulls a 3 pound wagon 4 feet. how much work has she done?