Recent content by waterliyl

Question Find all the values of ∏ in the interval 0 < θ < 2∏ for which 2cos2 θ – sin θ = 1, giving each answer in terms of ∏ I think the question is asking me to find the values of θ in terms of ∏ for all values between 0 < θ < 2∏ This is what I have done so far I have worked...

Why do electrons closer to nucleus have Less energy than electrons first away? Thanks

Hello, I was just looking up some pictures when I saw a picture of the northern lights. I was told that it was something to do with electricity? What actually happens up there? Thanks

So for my AS specification I need to know how to use the debroile wavelength equation which is fair enough and easy. I was wondering if anyone could tell me why do all particles have a wavelength or wave function? Or even like a tennis ball? Thanks, PS: I know it's a weird question...

Thank you!

Hello, I'm having difficulty trying to understand internal resistance of any component. I don't understand how exactly the internal resistance affects the current and what exactly is the terminal pd? And for calculating resistance, voltage, pd, emf, current and all those basic things -...

But why do we follow these principals ourselves? For instance we think know that an electron neutrino exists but actually, we just know that there is something out there which matches up with these equations and because logically if it has the characteristics of what we think we have found, then...

Thanks! That's really helpful :) But I guess it can happen the other way too right? I don't understand how one particle can change into another particle unless all particles are made of sort of a base of particles, which are quarks I guess but I thought electrons and neutrinos are leptons, and...

yes, i should have clarified. I'm sorry, I am talking about nuclear decay... I don't know why it happens though? I mean... something about exchange particles comes to mind and weak interactive forces but I don't think I understand exactly what happens?

but i thought, sometimes protons decay into neutrons, electrons and anti neutrinos?

Hi, so we are studying quantum physics at college and I just want to understand this concept of decay. Please could someone help me?