Water distribution Exam Questions and Answers(Rated A+)

how can you produce pressurized water? - ANSWER-push inward on the water, using a surface - confine and squeeze it as you push inward on the water - ANSWER-- it pushes outward on you you do work as you pump water into the pipe - ANSWER-work = pressure x volume - the pressurized water carries your work w/it - PPE (pressure x volume) where does the work you do pumping water go? - ANSWER-to the water at the delivery end of the pipe PPE is unusual b/c - ANSWER-its not really stored in the pressurized water its promised by the waters pressure source Steady state flow - ANSWER-steady flow in motionless surroundings - promised energy is as good as stored energy, so PPE is meaningful as water flows, what happens to its energy? - ANSWER-that energy is converted between several forms - in steady state flow, water flows along streamlines water flowing along a single streamline in SSF - ANSWER-has both PPE and kinetic energy - obeys Bernoulli's equation (no gravity) bernoulli's equation (minus gravity) - ANSWER-ordered energy = PPE x KE - applies to only incompressible fluids like water and assumes no ordered energy is wasted gravity causes pressure gradients - ANSWER-water has GPE that increases w/altitude pressure of stationary water inside pipes increases w/depth by - ANSWER-10,000 Pa/m When you drink water through a straw, the water - ANSWER-is pushed upward by a pressure imbalance equation w/gravity - ANSWER-water flowing along a single streamline in SSF - has PPE, KE, GPE gh = constant ordered energy - ANSWER-- as water flows downhill, speed pressure or both increase - if it falls from a faucet, speed increases - if it descends steadily from a pipe, pressure increases As water flows upward in a uniform pipe, - ANSWER-- its speed can't change (a jam or a gap would form) - so its gravitational potential energy increases - its pressure potential energy decreases As water flows downward in a uniform pipe, - ANSWER-- its speed can't change so its gravitational potential energy decreases - its pressure potential energy increases