Recent content by nashsth

Awesome, thanks for the information guys :)

Hi thanks for your response again! :) Yes I also forgot to do the calculations for the extension/retraction mechanism and the claw, but I feel that it shouldn't dramatically affect the torque requirements :/ The mass of these things are in the order of several hundred grams at most, and their...

Hi, thanks for your response. 20 RPM is 2.1 rad/sec, since RPM = rotations per minute (i.e. every minute, you're going 2pi radians), so 20 RPM = 20*2pi/60 sec ~ 2.09 rad/sec ~ 2.1 rad/sec. For the cylinder and the rods, since the claw in which the cylinder is housed is extendable/retractable...

Hi everyone, I want to rotate this (see attached image) platform at a speed of 20 RPM. To this end, I have to calculate the torque and power of a motor required. I have done preliminary calculations, however the numbers I'm getting doesn't seem right. For example, I'm getting that the torque...

Hello all, I am having a very hard time understanding the operating principles of solar cells. I'm mostly confused about what external biasing conditions a solar cell operates under. I have tried googling this question and I get different answers (see the links below). For the TL;DR version...

I see... so there's no relationship whatsoever between the dB wave and the wavefunction?

Hi Zapper, it seems that you and I both agree on the wavefunction "leaking" through the barrier, as you wrote in this question: https://www.physicsforums.com/threads/how-does-quantum-tunneling-work.119696/ So based on what you wrote there, the particle literally burrows through the barrier...

Hello, in my intro to quantum class, we recently started the chapter on quantum tunneling. While I understand the math, I don't understand conceptually what is going on. I do have my thoughts on the matter, but I am not sure that they are correct. I have a few questions: 1) Is the de Broglie...

Thanks for your help :-) And yes I will make sure to post similar questions to the appropriate sections. Apologies for the inconvenience

Ohh ok I see I see so you let u = sqrt(x), then x = u^2, so that du = 2u du Then you plug them into the 2nd integral, and then you get integral of f(u) / u * 2u du, which then simplifies into 2 * integral of f(u) du, which is 3, as given by the first integral, so that the answer is 2*3 = 6...

We learned about it a few days ago... I don't know what to substitute to solve the problem :-(

Hello, I don't know how to approach this problem, provided in the image below: I am assuming that in order to solve this problem, you have to transform the 2nd integral into the form of the first integral, but I am not sure if that's even the way to solve it, and even if it was, I don't know...

Hi, could you please expand on what you said? I didn't understand when you said the acceleration due to gravity is separate. :-(

Hi everyone I am confused about the acceleration of a ferris wheel undergoing uniform circular motion. By definition, the wheel undergoing uniform circular motion can't have a tangential acceleration, but I am confused as to why. I attached a diagram below to show you what I mean. Could you...

In a non-uniform circular motion (for example a pendulum), can the centripetal/radial acceleration ever be 0? Likewise, can the tangential acceleration ever be 0? The centripetal acceleration occurs because of the centripetal force, which causes the body (in the example of the pendulum, the...