1.Explain how different types of valve work and their applications (globe, diaphragm, pinch, gate, eccentric plud, butterfly and ball). 2. Explain how RTD and Infrared temperature sensors work? Advantage and disadvantages of each type? Their applications?

3. Explain how orifice and electromagnetic flowmeter work?

Several kinds of bears are found on earth. most bears are brown or black, but one type of bear, the polar bear, is white. what process led to this difference in fur color? explain your answer.

How do scientists think that gravity affected the formation of our solar system?

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?