Recent content by tsumi

Could somebody point me in the right direction? An year has gone by and this question hits me again x) and I still can't solve it.

Homework Statement Hello, I have done a laboratorial experiment (electron diffraction) and I've been doing the analysis of the obtained data. I have plotted the data obtained experimentally, and the slope of the obtained linear regression should give a certain value. What's happening...

I got it! You have to make cos(ω0t) = 1/2 (e^(iω0t) + e^-(iω0t)) (euler formula) Then use the linearity propertie of the transform and then the modulation propertie. Thanks for such a quick response anyway =)

Homework Statement Fourier Transform f(t)=H(t).cos(ω0t) ,using the transform of H(t) H(t)=Heaviside function (also known as signal function if I ain't wrong) Homework Equations (1) FT[f(t)] = ∫ f(t).e^-(iωt) dt (2) FT[H(t)] = pi.δ(ω) + 1/iω (3) δ(ω) = Delta Dirac Function (4)...

It seams we are meant to work out the probability of after measuring the system with B and it becoming in state a0, getting the result 0 with the operator A. It's like a composed probability, something like that, one probability times the other. The state at the beginning isn't told, I suppose...

Homework Statement A quantic system can be found in the states |a0> and |a1>, and those are eigenstates of the operator A with the respective eigenvalues: 0 and 1. Consider the operator B defined by: B|a0> = 7|a0> - 24i|a1> and B|a1> = 24i|a0> - 7|a1>. After measured by the operator B the...

That's it! Thanks a lot =)

Homework Statement Get an inverted quadratic equation (-x^2) with maximum y=100 and roots x=0 and x=1/120. Homework Equations The Attempt at a Solution I tried changing the several terms of the quadratic equation, used the quadratic formula setting c=100, and x=0 with the...

And when I introduce the coefficient in the expanded series shall I put it positive or negative? I finally got able to attach files, sorry I'm not using LaTex. I think it is readable, hope you understand it. Thank you for your time.

I cannot attach images, I press attachments and nothing happens... But while I was trying to explain how I did it I noticed my error. At least a big one, because I'm not getting exactly the expected result yet. The expected result for the relative intensities of the harmonics is: 1 : 0 ...

Homework Statement p(t)={ -1 from -1/220 to -1/330 0 from -1/330 to -1/660 1 from -1/660 to 1/660 0 from 1/660 to 1/330; -1 from 1/330 to 1/220 } p(t) represents the period of the excess air pressure of a sound wave. Find the harmonics...

Thanks for helping...

the speed 6.93 is a calculated value but is correct. I know the speed is independent from how high the tank is from the ground, so I tried it two ways. I'll write them down: ρ= 1000 g= 9.8 Bernoulli at hole = Bernoulli when hitting the ground P + 1/2ρv² + ρgh = P + 1/2ρv² + ρgh P +...

Homework Statement A tank of height h full of water with it's base 40 meters from the ground, with a hole on the lateral wall at the base. The water comes out of the tank at 6.93 m/s to fill a pool on the ground. The water hits the center of the pool at a distance of 19.5 meters measured...

Homework Statement i just want to know one value that i can't find anywhere, and would love some help Homework Equations \lim_{x\rightarrow\ -\infty}|x|} The Attempt at a Solution thanks