Topic 1 Flashcards
What is the base unit for length?
meter
What is the symbol for meter?
m
What is the base quantity of a meter?
length
What is the base unit for mass?
kilogram
What is the symbol for a kilogram?
kg
What is the base quantity for a kilogram?
mass
What is the base unit for time?
second
What is the symbol for a second?
s
What is the base quantity for a second?
time
What is the base unit for a current?
ampere
What is the symbol for an ampere?
A
What is the base quantity for an ampere?
current
What is the base unit for temperature?
Kelvin
What is the symbol for Kelvin?
K
What is the base quantity for Kelvin?
temperature
What is the base unit of an amount of substance?
mole
What is the symbol for mole?
mol
What is the base quantity for a mole?
Amount of substance
What are derived units?
units that are made up out of base units
What are units that are made up out of base units?
derived units
What is precision?
how well repeated measurements of a value agree with one another (exact)
What is how well repeated measurements of a value agree with one another (exact)?
precision
What is accuracy?
how well a measurement agrees with the true value (correct)
What is how well a measurement agrees with the true value (correct)?
accuracy
When using an analog scale, what is the uncertainty?
plus or minus half the smallest scale division
On what scale is it when the uncertainty is plus or minus half the smallest scale division?
analog scale
When using a digital scale, what is the uncertainty?
plus or minus the smallest unit shown
On what scale is it when the uncertainty is plus or minus the smallest unit shown?
digital scale
When taking repeated measurement how do you find the uncertainty?
range/2
When multiplying or dividing quantities, how do you find the resultant uncertainty?
add the percentage/fractional uncertainties of the quantities that we are multiplying
When adding or subtracting quantities, how do you find the resultant uncertainty?
add the absolute uncertainties of the quantities we are measuring
∆a = ∆b + ∆c
a b c
Is velocity a vector?
Yes
Is acceleration a vector?
Yes
What is a scalar quantity?
magnitude only can be described by a number with units
What is a vector quantity?
magnitude and direction must be described by a number (its magnitude) and its direction
