Why is understanding science the first step in engineering?
A. Science is much older than engineering
B. A degree in engineering requires a degree in a science first
C. Science helps engineers, but engineers never advance science
D. Science provides the basic rules that engineers must use when creating products

Water in a partially filled large tank is to be supplied to the roof top, which is 8 m above the water level in the tank, through a 2.2-cm-internal-diameter pipe by maintaining a constant air pressure of 300 kpa (gage) in the tank. if the head loss in the piping is 2 m of water, determine the discharge rate of the supply of water to the roof top in liters per second.

Natural gas (95 percent methane and 5 percent ethane by volume) flows through a 90 cm diameter pipeline with a velocity of 3 m/s. the pressure in the pipeline is 700 kpa, and the temperature is 15°c. calculate: (a) the mass and volumetric flow rates in this pipe.

Both elongation and reduction of area represent the ductility of a specimen. are there any differences between these two in terms of material properties?