General Physics Flashcards
State the 7 base/SI quantities with their units
- distance/length (metres = m)
- temperature (kelvin = K)
- mass (kilogram = kg)
- time (seconds = s)
- current (ampere = A)
- amount of substance (moles = mol)
- luminous intensity (candela = Cd)
x10^3 - prefix and letter used to represent
kilo (k)
x10^6 - prefix and letter used to represent
Mega (M)
x10^9 - prefix and letter used to represent
Giga (G)
x10^12 - prefix and letter used to represent
Terra (T)
x10^-3 - prefix and letter used to represent
milli (m)
x10^-6 - prefix and letter used to represent
micro (μ)
x10^-9 - prefix and letter used to represent
nano (n)
x10^-12 - prefix and letter used to represent
pico (p)
x10^-2 - prefix and letter used to represent
centi (c)
What is precision in data
- how close the values are to each other
- the consistency of the values together
What is accuracy in data
close to the true/agreed value
What is validity in data
- when the measurements relate and are to do with what you are trying to find out
Valid results mean a ….
fair test - keeping all the control variables the same
Important things you should do when collecting a set of data
- take multiple readings and find a mean
- Identify and remove anomalies
what are the common mistakes made during calculations
- not converting
- rounding incorrectly or before the question is finished
- putting the wrong values into and equation
- rearranging an equation incorrectly
- giving the answer to the wrong significant figures or decimal places
what is the equation for the area of a triangle
0.5 x base x height or 0.5 x a x b x sin c
what is the equation of the circumference of a circle
2 x π x radius
what is the equation of the area of a circle
π x radius^2
what is the equation of the surface area of a cylinder
2 x π x radius x height + 2 x π x radius^2
what is the equation of the volume of a cylinder
π x radius^2 x height
what is the equation of the surface area of a sphere
4 x π x radius^2
what is the equation of the volume of a sphere
4/3 x π x radius^3
