Water flows through a horizontal pipe of cross-sectional area 10.0 cm 2 at a pressure of 0.250 atm with a flow rate is 1.00 l/s. at a valve, the effective cross-sectional area of the pipe is reduced to 5.00 cm 2. what is the pressure at the valve? the density of water is 1000 kg/m 3, and treat it as an ideal incompressible fluid.

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Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.