The graph in the figure shows the variation of the electric potential v(x) (in arbitrary units) as a function of the position x (also in arbitrary units). which of the choices below correctly describes the orientation of the x-component of the electric field along the x-axis?
a. ex is positive from x = -2 to x = 0, and negative from x = 0 to x = 2.
b. ex is negative from x = -2 to x = 0, and positive from x = 0 to x = 2.
c. ex is negative from x = -2 to x = 2.
d. ex is positive from x = -2 to x = 2.

How is acceleration calculated? a. initial velocity - final velocity / timeb. initial velocity + final velocity / timec. final velocity - initial velocity / timed. final velocity / timele select the best answer from the choices provided0oood00save and exitnextmark this and return

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)

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?