Which explains why the sky appears blue on a sunny day? a. colors of light with longer wavelengths scatter too far for the eye to detect. b. blue light scatters in all directions more than other colors of light. c. tiny particles in the air act as a polarizing filter, blocking other colors of light. d. blue, green, and yellow light is reflected by tiny particles in the air.

Consider a one meter long horizontal pipe with a constant 100 cm^2 cross sectional area. water flows rightward into the pipe at x = 0 with flow velocity 02m/sec at every point within the pipe intake area. at x=1, the rightward flow rate is 0.192 m/sec. assume the water is a conserved quantity in the pipe, so there must be a leak (a sink) somewhere in the pipe. 1. compute net volumetric flow of the source if the system to be in equilibrium. 2. now assume the pipe in the problem has no leaks. compute the net volumetric rate of change for the system.