the nurse manager collect data about hours worked, age, sex, and geographic area of the nursing staff over 10-year period. What type of research would this be considered?

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

What is the heat treatment of metals? what is the benefit of it? why and how it's useful? answer in details, do not write by hand.

Apiston-cylinder device contains 0.1 m3 of liquid water and 0.9 m3 of water vapor in equilibrium at 800 kpa. heat is transferred at constant pressure until the temperature of water reaches 350 °c. determine (a) the quality of water at the initial state (b) the work associated with this process, (c) the heat associated with this process.