2022 Mistake Flashcards
If resistance applied snd your firing something dint be stupid THINK IN REAL LIFE PERSPECTIVE
Real life itsgonna be less distance, mould answer to that
Time of flight is bigger, but v is much smaller due to drag, as over smaller distances the time t of flight won’t INCREASE BY THAT MUCH
Don’t lack
And if answer suggests can’t decide SAY THAT
6 markers even though they don’t mention draw a labelled diagram, or use auantative analysis use it ANYWAYS
So draw herts
Rung rustle, and use fsctord to determine how much rope should icnrease / decrease by etc
6 marker on deducting stres on rips , how to do d
- change the ropes
- change the shape
Using young modulus equation, thing about it it tells you the max force it can have
- increase by increasing e , cross sectional area, (reduce length)?
- tell the, how much by ti increase
2 changing the shape you get correct, reduce area to reduce mass and change of momentum’s
- make more stream line so change of momentum is less, such that they dint stop at 0 velocity
Explain total increase in internal energy what do you have to say
Mist say ke and pe is total , so if one increase but other doesn’t overall it does
Pressure is used to drive some water down and up, how to find the change in pressure?
Pressure + water pressure = atmospheric, as at that point they are BALANCED
Pressure - afmosheic this = water pressure now
Okay so as we have to go (higher / lower) ore measure total distance changed from equailborum and going AGAINST the atmosphere, we have to use double displacement
Always look at situation BEFORE AND AFTER
What causes nebula to collapse 1 mark
Gavrwtional force
Sequence of red giant 4 marks
IMPORTANT FOR the red giant
Say as much as you can for each point
1) fuel runs out, cop please and red giant formed
2) hydrogen shells, so pushes out layers, they escape as PLANETARY NEBULLAE (MUST SAY)
3) eventually ends up white dwarf
Super red route
1) hydrogen fuel runs out, and fuel of shells
2) implosion and supernova, ejecting into space
3) As remaining mass of core bigger than 1.44m , end up as neutron star or black hole
Why do cooler stars stay longer than hotter , what to do using data and hertelrung
Draw HR to identify if yiu have higher or lower luminosity based on temp
Show by STEFANS LAW TOO
- compare luminosity ratio to mass ratio.
As higher luminosity stars have lower mass ratios in comparison, this means higher luminosity stars EJECT mass higher rate
Link this to answer, try to show data too
It says gpe and ke are conserved in an eliptical field, why can’t we I eindusele cslaulte ke ? But can use difference in gpe = gain in ke?
Beacsue ke calc involves using SAME TIME PERIOD, but eliptical time period is approximation
However gpe is TRUE for any eliptical orbit because it’s still distance away from sun
So use change in gpe to represent gain in ke !
This will ALWAYS WOEK
Remmeber total ke means total number of atoms multipleid be ke of one
So need to find total number of atoms. Use clues to find, don’t lack
For oressure alwhas look at FINAL DIFFERENCE IN HEIGHTS
And add for total
Rememebr what is N
Total atoms
Number density is number of atoms per unit mass
If they ask you to work out somethinf in the q, YOU MUST INTEGRATE IT INTO YOUR ANSWER SOMEHOW
Here they asked to find b
The relevance of b was that a small increase in mass meant big increase in luminosity
Now kust know that luminosity is linked to The LOSS IF MASS, so higher lumniosity = higher loss of mass, and show this with data
But yh if they ask you to find a value MUST USE it somehow, else limittin marks g
