1 .Working As A Physicst Flashcards
What does SI stand for
Standard international
Give unit and Symbol for Length
Metre m
Give unit and symbol for mass
Kilogram kg
Give unit and symbol of time
Seconds s
Give unit and symbol for electric current
Ampere A
Give unit and symbol for thermodynamic temperature
Kelvin K
Give unite and symbol for amount of a substance
Mole mol
Give unit and symbol for luminous intensity
Candela cd
What is absolute zero in kelvin
0k
Derived Units are combinations of what
Base units
Definition of error
Measure of how far away from the true value a reading is.
Definition of random error
Measurements vary to unpredictable circumstances.They can’t be corrected.
Definition of precision
How close measurements are to each other and the mean.
Definition of accuracy
How close a measurement is to the true value.
Definition of repeatable
The original experimenter repeats the investigation using same equipment and method to get same results.
Definition of valid
Your results give you information about what you set to investigate.
Definition of Resolution
Smallest change in a quantity being measured that gives a perceptible change in the reading
How long is human reaction time
0.2s
Derived units for velocity
M/s or ms^-1
Derived units for acceleration
Ms^-2
Derived units for work done(same as joule)
Kgm^2/s^2
Derived units for force
Kgms^-2
Derived units for power
Kg m^2 s^-2
Derived units for frequency
S^-1
Derived units for charge
As
Derived units for voltage
Kg m^2 s^-3 A^-2
