Jan 12, 2022 · I'd say that you are looking at it backwards; it is better to imagine that eletric fields generate forces on charges. For a given eletric field, the bigger the charge, the greater the force; to …

The distance for the lens or lens set to converge an incoming parallel beam to a single point. For a diverging lens or set extend the diverging rays backwards until they converge on the optic axis. The …

Do low frequencies carry farther than high frequencies? Yes. The reason has to do with what's stopping the sound. If it weren't for attenuation (absorption) sound would follow an inverse square law. …

Feb 3, 2022 · I recently started to learn about circuit theory, and in the book it straight up defines voltage as $ dW/dq$, or the derivative of energy with respect to charge. The thing is, I always thought of c...

Apr 25, 2020 · I would say yes. From Maxwell relations we have "S= -∂F/∂T" for V=const. Insert in the definition of F, put F under the derivative wrt T and obtain : -U/T^2 = ∂/∂T ( F/T). Then simply …

Sep 25, 2015 · In domestic electrical circuits, there are 3 wires - live, earth and neutral. What is the difference between the live and neutral wires? As there is AC supply, it means that there are no fixed …

Feb 14, 2011 · It's been a long time since I've done optics but 1/f' = 1/f1 + 1/f2? So then the focal length of a plano convex lens is twice that of the biconvex lens. If you place a light source at 2f from a …

Nov 21, 2022 · Planck's constant is a conversion factor which changes the units of energy from a classical basis (as joules, for example) to a quantum basis which has wavelength (and therefore …

Jun 25, 2015 · The resonant, frequency is the frequency at which an object tends to vibrate. Every rigid object in existence has a natural structural resonance frequency, a frequency at which it, …

Jul 28, 2021 · Analytic solution to the pendulum equation for a given initial conditions and Exact solution for the nonlinear pendulum (also here)