Lecture 2 Formulas

Question 1

Pressure

Answer 1

P=F/a

Question 2

Hook’s Law

Answer 2

F=-kx

Question 3

Pascal’s Law

Answer 3

Pressure exerted anywhere in a confined incompressible fluid is transmitted equally in all directions throughout the fluid.

Question 4

Hydrostatic Pressure

Answer 4

P=pgh
p(row) = density
g = acceleration due to gravity
h = height of the column of fluid
Pascals = 1kg/(m*s^2)

Question 5

Mercury Density

Answer 5

Density

1mmHg = 13.6gm/cm^3

Question 6

Conversions

Answer 6

1.36 cmH2O = 1mmHg
1 cm H2O = 0.735 mmHg
1 inch H2O ≈ 1.87 mmHg
1 inch blood ≈  2mm Hg
1.28cm blood = 1.00mm Hg

Question 7

Large Volume Injections (needle)

Answer 7

Hypodermic needle is not good for quick delivery because the high resistance of the smaller diameter requires more force to create the same flow as a larger bore needle.

Question 8

Acceleration Due to Gravity

Answer 8

9.8 m/s^2

Often rounded to 10 m/s^2