John Rennie
Reputation
180,798
99/100 score
 2h comment There is a hollow object where will the charges reside? Inside the balloon or on the surface of it? Possible duplicate of electric charges on the surface and inside a charged body 2h reviewed Approve Flow rate of gas down a pipe at low pressures 2h reviewed Close Is this correct? 2h reviewed Close Hurricane Emily 2h comment Hurricane Emily Hi and welcome to the Physics SE! Please note that this is not a homework help site. Please see this Meta post on asking homework questions and this Meta post for "check my work" problems. 2h reviewed Close Rainbow Black Hole 5h comment What would happen if a black hole merged with a white hole of the same size? Hi WeatherMan, I've linked a duplicate of your question, though I have to say that most of the answers to the duplicate are pretty low quality. 5h comment What would happen if a black hole merged with a white hole of the same size? Possible duplicate of: Black hole - white hole (collision) 5h comment What would happen if a black hole merged with a white hole of the same size? I think this is an a interesting question. While white holes don't exist they are mathematically well defined so the question should be answerable, though the answer is not immediately obvious to me. Historically theorists have not been worried by the (current) lack of experimental evidence for their wilder notions, so it seems a petty reason to complain about this question. 5h reviewed Leave Closed Where can a particle be found in a wavefunction 5h comment Where can a particle be found in a wavefunction By specifying the particle lies on the $x$ axis you are specifying that $\Delta y = \Delta z = 0$ and therefore that $\Delta p_y = \Delta p_z = \infty$. So the particle will instantly spread off the $x$ axis. 5h reviewed Approve Calculating amplitude for chain of polaroids 5h reviewed Approve Proportion of photons passing through three polarizers 5h reviewed Approve Why is an electron negatively charged, and what is the difference between negative and positive charges? 5h reviewed Looks OK What would happen if a black hole merged with a white hole of the same size? 5h reviewed Delete Why is an electron negatively charged, and what is the difference between negative and positive charges? 5h reviewed Leave Open Infinitesimal gauge invariance of Yang--Mills Lagrangian 5h reviewed Leave Open Does the irradience on a surface change as the length scale of the surface patch approaches the wavelength of the incident light? 5h reviewed Close Tsunami Modelling 5h comment Tsunami Modelling Hi and welcome to the Physics SE! Please note that this is not a homework help site. Please see this Meta post on asking homework questions and this Meta post for "check my work" problems.