Revision Flashcards
Youngs modulus =
stiffness = springs constant = k
Absolute uncertainty is always
+/-
Extrapolation is
innacurate
Vernier callipers x.ymm
x = value just before where 0 is y = where two lines meet up
Smaller measurements - uncertainties
Less absolute uncertainty but more percentage uncertainty
Fringe spacing for a single slit =
2Dlambda/a
Diffraction grating equation =
dsinX = nlamba
Constant y or x then graph is
linear
SinX =
amount of diffraction = fringe spacing
Efficiency =
output/input (rate of transfer)
0electron1 =
-1electron0
Lost volts =
emf - V = switch open - switch closed
Lost volts/current = internal resistance
Watts =
Joules/second
Power =
Energy/time
If go back to start point then displacement = 0 so
velocity = 0
Average speed =
total distance/total time
Time of flight =
Time up * 2 = time down * 2
Time up = time down
time up + time down
Rate of power lost =
rate of voltage lost
Adding a resistor in parallel causes
a decrease in the total resistance
1/Rt = 1/R1 +1/R2 + 1/R3
Q =
number of electrons * charge
emf =
V + I(r)
Intensity =
power/area
Reversing cells
cancelling 2 when 1 reverses
no. of lines =
1/spacing
V1/V2 =
R1/R2
Upon impact momentum =
0
Diameter of atom =
10^-11
Minimum distance of wave =
1st harmonic –> L=0.5lambda
As temperature increases in a thermistor what happens to its conducting capabilities
Resistance decreases so current increases so conducts more like a superconductor
Strangeness of K+
1
Strangeness of K-
-1
Strangeness of K0
1
Strangeness of antiK0
-1
Vernier caliper -
check jaws for zero error
Micrometer =
- 5mm resolution
0. 1*xmm where lines meet up
How to reduce parallex error
Move ruler closer to whats being measured and make sure the eye-view is in line with the measurement in order to reduce it
Average velocity and acceleration with light gate
Use on card for velocity and two for acceleration
Vernier scale =
value just before 0 + where lines meet up again
Ruler absolute uncertainty =
2*0.5mm=+/- 1mm
Time absolute uncertainty =
+/-0.2s
Voltmeter measures
Change in voltage = potential difference
Name a particle that is difficult to detect
Neutrino
Conservation of energy states
Energy cannot be destroyed only ever transfered
Progressive waves’ traits
Transfers energy from one point to another without transferring material
Moment =
Force*perpendicular distance from line of action to pivot point
Electron capture =
Orbital electron and proton in nucleus forming a neutron and releasing a neutrino
Couple =
A pair of equal and opposite forces acting on a body but not alone the same line
