Ella is interested in combining substances to form a new material. She read about some of the products chemists have discovered. She learned that sometimes synthetic materials are created accidentally. For instance, a chemist working on plastic gun sights synthesized a very sticky material accidentally. Which product had he accidentally made? A. a slinky toy
B. a super glue
C. a new sweetener
D. a non-stick surface

Identify the theory that can be used to explain each phenomenon. answers diffraction: wave theory interference: wave theory reflection: both particle and wave theories refraction: both particle and wave theories

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.

What does si stand for,when referring to a system of measurement