Lecture 1 Flashcards
What does the value of ‘0.005’ represent in this example?
The absolute error (Δx)
Calculate relative error
Δx/x
A measurement with low systematic error is classed as…
Accurate
A measurement with a low random error is classed as…
Precise
Formula to calculate the mean.
Formula to calculate the standard deviation
Formula to calculate the error of the mean
Formula to calculate the absolute error of the result of radioactive counting.
Formula to calculate the relative error of the result of radioactive counting.
Formula to calculate the absolute error of a sum
Formula to calculate the absolute error of a difference
Formula to calculate the relative error of a product
Formula to calculate the relative error of a ratio
Give the symbol for electric current
I
Give the symbol for luminous intensity
(Lu)
Give the standard unit for electric current
Amper (A)
Give the prefix for 10-12
Pico
Give the prefix for 10-9
Nano
Give the prefix for 10-6
Micro
Give the prefix for 10-3
Milli
Give the prefix for 10-2
Centi
What is macrotransport?
Considerable amounts of material are carried in large distances in tubes and vessels.
What is microtransport?
Small amounts of material move in short distances involving molecular displacements. E.g Diffusion
What are the two characteristics of an ‘ideal fluid’?
Incompressible
No frictional forces
Give Newton’s second law
F = m a
- F= Force*
- m= Mass*
- a= Acceleration*
Formula to calculate density
What are the units for density?
Unit: kg/m3
Formula to calculate pressure
What are the units for pressure?
Unit: pascal (pa)
Formula to calculate bouyancy (B)
What do the components mean?
- V = volume of object*
- ρo = density of the object*
- g = gravity*
Define bouyancy
A body is immersed in a fluid is acted upon by an upward force equal in magnitude to the weight of displaced fluid.
Formula to calculate flow rate
V = Volume
t = Time
Formula to calculate flow rate of a fluid with a uniform velocity
Q = Av
- A = Area*
- v = speed of the fluid*
Give Bernoulli’s equation (Conservation of energy)
P = Pressure Energy
ρgy = Potential Energy
½ρv<strong>2</strong> = Kinetic Energy
Calculate Bernoulli’s Equation if v = 0
P + ρgy = Constant
Formula to calculate the pressure at a given depth (PB)
d = length of the volume of the liquid
Formula to calculate the pressure in a manometer.
Formula to calculate blood pressure
Formula representing the force of acceleration on the pressure of the brain and heart
What is shown in the figure?
A Venturi tube
What is being shown in this figure?
The change in pressure as blood passes through an atheroma in an artery.
