Homework Statement
Consider the following, A collimated light source impinges on a plane diffraction grating and diffracts via the well known diffraction equation. The diffracted light is then collimated by a 1 metre focal length lens (good quality one). It is experimentally verified that the...
A question about the "flatness" of the universe.
I may be out of my depth here or overthinking it but...
Does the fact that the universe is flat (angles in triangle add upto 180deg) mean that the complete universe has to have a edge?
If it had positive curvature, then it doesn't...
Hello everyone,
Its been 4 years now since I posted, Last time i was asking for school homework and now I'm about to finish my physics master degree with 1 exam left in cosmology.
As I'm sure you are aware, the k term in the Friedmann equation represents the curvature term k = 0, -1 & +1...
I can't take any more points
While i understand the box method, I was interested in a some sort of program being able to do the hard work for me lol
sid
Homework Statement
I am trying to work out if there is an elegant way to do a line of best fit(straight) through a set of points (3) while taking into consideration their error bars? Clearly I'm looking for a piece of software that can do this. Obviously excel, etc can do a standard straight...
Hmm i can follow Data logic despite never have seen anything like that before,
I guess now the main problem is that equation gives me the velocity. for the model i am making the data readings are distances at a given time. Hence I will most probably to integrate that beast.
All i know is...
Hi i posted last time about solving an equation regarding air resistance being proportional to the speed
This time i need it to be proportional to the speed squared
I have managed to get an equation but haven't managed to solve it yet
dv/dt -(k/m)v^2 = g
Any ideas on how to solve...
Unfortunately i am not aware of that method
the only ones i know are auxiliary equation, separation of variables and intergrating factors
Do you which one of those will work.
sid
Is the actualy equation correct though?
Or am i missing something
sid
BTW by linearise i think you mean
ln(S)=LnA + LnB -RT
So a plot of Kn(S) against T for some values should yeild the gradinet at -R
yeah ?
Hi guys
I need help solving the following differential equation for air resistance
d^2s/dt^2 + R ds/dt = g
Where g = gravity I presume and R = k/m where k = resistance constant
Using my limited knowledge I think that the auxiliary equation for this is
Y^2+ RY = 0
Y = 0 or R...