Which of the following describes the supply curve of baseballs hit for home runs during the 1999 World Series?
a. The supply curve is vertical.
b. The supply curve is horizontal.
C. The supply curve slopes upward from left to right:
d. The supply curve slopes downward from left to right.

For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater