Extra Formulas Need To Know / Ways To Solve Auestions? Flashcards
Power / luminosity changes from far to close sensor
You need to find out the power coming from far away (luminosity ) call it x, and we have the area and power received at y
We know the intensity at y = power at x/ area between (radius surface area )
Thus power at x = intensity at y x area between
- we have the are between easy they gave us distance so use 4pi r 2
But the power at x
Can use ANOTHER EQUATION
Well it’s the same one, but intensity at y = power at y received x area at y
Bsdicsllt we need to remember that same power equation can be used in different scanrioes !
So what are the two scenarios same power equation for itnsitty can be used
What’s the only varibale bounded by distance?
1) how intensity has decreased as a result of distance
2) what the intensity is as a result of current power and area too!
I’d you can use these then you can do the q very easily!
Only thing bounded by distance is intensity, powers etc will change due to the area
How to find MAX NUMBER OF BRIGHT SPOTS using diffraction grating?
Find the order, make sure to round down
But the order just means in ONE side, need to count this TWICE
- and there will be another one in the 0 ORDER
so if order is 6, it would be 13!
Remember how to find the internal energy of a ideal gas?
= kinetic energy of gas maolecules as has no potential
Therefore do 1/2m c sqaured hat using mass as total mass by moles x abagadro x mass on one
What happens when you cut spring in half to spring constant of Both new springs
Doubles
How to find new expressions relating things together when its not working
try squaring bith sides
How to do how does gpe and ke vary in time? What is the key thing
Describe how it varies
- and then how with TIME
So if constant , then prodptimsl to time
Remember Newton 3rd pair (2 marks)
Same type of force, different bodies
Remember explain each and every part of what question is asking camr go wring
