Studied by 1 person
magnitude
size of a quantity
homogeneity
The SI unit must be the same on both sides of the equation
Random error
not predictable or constant, caused by human ability,
parallex error
not being at eye level and reading the scale wrong, can be averaged out
Systematic error
Occur due to faulty equipment , cannot be averaged out.
Absolute Uncertainty
+-(1/2 x resolution of measuring equipment)
percentage uncertainty
absolute uncertainty/measurement x 100
absolute uncertainty (repeats)
+-(1/2 x range of readings)
add absolute uncertainties
Adding/subtracting uncertainties
add percentage uncertainties
Multiplying/dividing uncertainties
Multiply percentage/fractional uncertainty by power
Raising to a power
High random errors
large range of measurements (accurate, not precise)
Systematic errors
peak of the graph displaced to the left or right (not accurate, precise)
resolution
the smallest change in the quantity being measured (input) of a measuring instrument that gives a perceptible change in the reading
scalars
Have a magnitude and a unit
length, area, volume, speed, mass, density, pressure, temperature, energy, entropy, work, power.
Vectors
Have a magnitude. unit, and a direction
displacement, velocity, acceleration, momentum, force, lift, drag, thrust, weight.
Distance
How many meters an object has moved while changing positions (scalar)
displacement
length of the gap between two points (vector)
relative velocity
the velocity of an object in relation to another
Vector components
The components (usually horizontal and vertical) of a Vector
SI base units
Elcectrical current (A), thermodynamix temperature (K), time (s), length (m), mass (kg), Luminous intensity (cd), amount (mol)
