Foundations Of Physics Flashcards
What are the 6 SI base units?
Mass (kg) Length (m) Time (s) Current (A) Temperature (K) Amount of substance (mol)
What is the prefix for x10^-12
Pico (p)
What is the prefix for x10^-9?
Nano
What is the prefix for x10^-6
Micro
What is the prefix for x10^-3?
Milli (m)
What is the prefix for x10^-2?
Centi (c)
What is the prefix for x10^-1
Deci (d)
What is the prefix for x10^3
Kilo (k)
What is the prefix for x10^6?
Mega (M)
What is the prefix for x10^9?
Giga (G)
What is the prefix for x10^12?
Tera (T)
What is accuracy?
Results close to the true value
What is precision?
Results are close to each other
What are systematic errors?
A series of errors in accuracy that are consistent caused by a problem that is consistent through an entire experiment
What are random errors?
Errors caused by random and unpredictable variation, normally cause anomalies
What do you do when you add or subtract two values with uncertainties?
Add the absolute uncertainties
What do you do when you multiply or divide values with uncertainties?
Add the % uncertainties
What are the uncertainties for a mean work out from a table of repeats?
=range/2
% uncertainty =
Uncertainty
—————— x100
Value
Percentage difference=
Experimental value-accepted value
————————— x100
Accepted value
How can you check the homogeneity of an equation?
Convert both sides of an equation to SI base units and if they are both the same it is homogeneous
What is a scalar quantity?
A quantity with magnitude but no direction
What is a vector quantity?
A quantity with both magnitude AND direction
What are the equations for resolving component of a vector quantity?
Fx=Fcos(angle)
Fy=Fsin(angle)
