What is ds in ds2 = dx2 - cdt2 - Physics Forums
May 5, 2019 · Hi, I'm just an amateur, no physics qualifications. I've been reading here. Professor Richard Conn Henry likes the word trivial. None of this is trivial for me. Einstein apparently …
Implicit differentiation find dy/dx and d2y/dx2 - Physics Forums
Oct 11, 2009 · 2xy=3x-y^2 find dy/dx and d2y/dx2 I just want to make sure my answer is right and simplified I got dy/dx= (3-2y)/ (2x+2y) Now d2y/dx2 took some...
Leibniz Notation Explained: dy/dx, d2y/dx2, d/dx - Physics Forums
Nov 11, 2013 · I never really understood leibniz notation. I know that dy/dx means differential of y with respect to x, but what do the 'd's mean? How come the second-order differential is …
Heat equation - separation of variables • Physics Forums
Jul 24, 2010 · Homework Statement du/dt=d2u/dx2, u (0,t)=0, u (pi,t)=0 u (x,0) = sin^2 (x) 0
Parametric equation confusion of d2y/dx2 • Physics Forums
Apr 1, 2012 · x=t2 and y=t3-3t, find dy/dx and d2y/dx2 I understand how to get to dy/dx but an confused on how to get to d2y/dx2 can someone please explain in depth, I...
Why is the second derivative notation written as d^2y/dx^2?
May 4, 2009 · I often see the second derivative written down like this: \frac {d^2y} {dx^2} Although it seems more logical to me to write \frac {d^2y} {d^2x^2} Or...
How to Add Metres & Seconds for Equal ds2: Einstein's Theory
May 4, 2023 · Reading this PDF from Professor Richard Conn Henry, I am confused by the multiplication by c on page 2. Einstein's claim is that dx2 + dy2 + dz2 − dt2 = ds2 = dx′ 2 + dy′ …
Solving Du/dt=A*d^2u/dx^2 w/ Boundary Conditions - Physics …
Jan 29, 2013 · du/dt = A*d^2u/dx^2 Where u=u(x,t) and A is a constant. The boundary conditions are: u=f(x) when t=0 u=0 when x=0, independent of t u=V when x=L, independent of t, where …
the best two-point formula will involve abscissas that are chosen symmetrically on both sides of x.
Partial derivative chain rule proof - Physics Forums
Nov 11, 2012 · Homework Statement If u=f (x,y) where x=escost and y=essint show that d2u/dx2+d2u/dy2 = e-2s [d2u/ds2+d2u/dt2 Homework Equations...