Recent content by shangriphysics

Thanks ChrisVer! This clarified my confusion.

I was wondering, in the context of electron excitation and electron affinity, what it meant when we say that the electron absorbed energy or released energy. I think for electron excitation, the photon's energy, which is in the form of work= force time distance from the photon particle is...

Thank you everyone! This makes a lot more sense now. Phew. Physics is so weird!

Hi Physics Forums! The ground state electron is the largest negative value, but what does this mean? Does this mean that kinetic energy is a positive value above zero? It seems at the ground state, the electron might also have kinetic energy as it is moving around as well as potential...

Ahh thanks you guys! Quick question, are the forces on the moon perfectly in balance with the force of gravity, so that it would not come crashing down, and if so, could we possibly have a satellite mimick this phenomena and therefore have it stay up in orbit until the Earth gets destroyed?

I know that the the satellite will lose speed(due to perhaps small air resistance), and therefore lose centripetal force? I am not sure how losing centripetal force and speed causes the satellite in orbit to lose radius. If force is the same, and velocity is lowered, than radius would increase...

Thanks Simon Bridge! This was super helpful!

Ooo hmm, interesting interesting. I am having trouble seeing what a non pure standing wave would look like. Ex. If one wave had a bigger amplitude, then when they construct it would have an amplitude inbetween, but when they destruct, then the amplitude might never go to zero at the anti node.

Do all standing waves have to have the same frequency and amplitude?

Ahh I think I get the satisfying gist of the concept! Thank you so much Chet for your benevolent help!

I know that momentum is conserved when no "net" external forces such as Friction, Gravity, and air resistnace normal force; However, during inelastic collisions it says kinetic energy is not conserved because of external forces as well. 1. Are the external forces different for mechanical energy...

Thank you Chet!

I guess in my hypothetical human body in which the fluids are incompressible, neglible internal friction(viscocity), for each diastolic and cystolic pressure, the pressure would be the same as well as the flow rate.

I was wondering why when the blood vessels constricted the speed of the blood decreased? I thought that since the flow rate has to be the same, the volume of blood that reaches a smaller area from a bigger area will increase in speed and hence decrease in pressure? Perhaps is this due to the...

In a barometer, assuming bernoulie properties(incompressible fluid) if we replaced the mercury with alcohol and water why would the alcohol be able to be displaced further with pressure. It has a lower density that water 800kg/m^3 than water which has 1000kg/m3. What chemical properties or...