Fluids (sec 4)

Question 1

absolute pressure P = P(o) +dgh

Answer 1

absolute pressure = pressure above the fluid + the pressure the fluid placing on that point

Question 2

gauge pressure P = P-P(atm) = (P(o) + dgh) - P(atm)

Answer 2

gauge pressure = total pressure at a point - atmospheric pressure = (P above the point of interest + pressure due to fluid) - pressure from the atmosphere

Question 3

F(1)/A(1)=F(2)/A(2)

Answer 3

if a force is applied through a fluid then the initial force, divided by it’s area, will equal the final force divided by its area.

Question 4

buoyant force = the density of the item being displaced * volume of item displace * gravity

Answer 4

In other words buoyant force is how much the object that could be in that space instead wants to be in that space.

Question 5

Q = v(1)A(1) = v(2)A(2)

Answer 5

Flow rate is constant in a pipe, so velocity will decrease in a manner directly proportional to an increase in area.

Question 6

Bernoulli’s equation

P(1)+.5densityv(1)^2+densitygh = P(2)+.5densityv(2)^2+densitygh

Answer 6

conservation of energy for a closed system with flowing fluid. It states that the sum of the static pressure and dynamic pressure at any two points will equal it each other.
Total pressure + dynamic pressure (.5densityv^2) + static pressure (densityheightaccelerationDueToGravity)