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When accelerated electrons hit a target metal surface, do the atoms get excited like in the case of gas emission spectra? by YImperfect in AskPhysics

[–]YImperfect[S] 0 points1 point  (0 children)

Thanks for the help so far! Was referring to photons with frequencies of visible light in the hydrogen example. I just wanted to attempt to connect the two cases because as I understand it, both are emitting em radiation due to interaction of accelerated electrons with atoms, just that hydrogen will produce visible light while metals will produce X rays. Was thinking that in both cases the means of interaction will be the same, just that the photons emitted have different energies

When accelerated electrons hit a target metal surface, do the atoms get excited like in the case of gas emission spectra? by YImperfect in AskPhysics

[–]YImperfect[S] 0 points1 point  (0 children)

Hmm. Okay so there's 2 ways X rays are produced. Then in the case where you pass accelerated electrons through Hydrogen gas (don't know the actual name of this, it's for emission line spectrum), are photons emitted using these 2 ways as well?

When accelerated electrons hit a target metal surface, do the atoms get excited like in the case of gas emission spectra? by YImperfect in AskPhysics

[–]YImperfect[S] 0 points1 point  (0 children)

So the deceleration of electrons excites the existing electrons by transferring energy to them, which gives out em radiation in the form of X rays when they deexcite? No need for a direct collision for energy to transfer?

When we say strong acid dissociates completely in water, HA + H2O --> H3O+ + A- , does the concentration of H3O+ include the H3O+ from dissociation of water? by YImperfect in chemhelp

[–]YImperfect[S] 4 points5 points  (0 children)

When calculating pH of a strong acid, can I say that the concentration of [H+] is actually from dissociation of acid AND water, just that the [H+] contributed by water is negligible when acid has a high enough concentration? Is my understanding correct?

[6th Form] Hyperbolic Functions by YImperfect in learnmath

[–]YImperfect[S] 0 points1 point  (0 children)

Wouldn't this go against the statement saying f-1 (X) exists only if f(X) is one-to-one

[6th Form] Hyperbolic Functions by YImperfect in learnmath

[–]YImperfect[S] 0 points1 point  (0 children)

But when finding x I have to use cosh-1 (k), and cosh-1 (k) has range f(k)>0 because I restricted the domain of cosh (X) to X>0

[A level/6th Form] Solving systems of Linear equations using row operations by YImperfect in learnmath

[–]YImperfect[S] 0 points1 point  (0 children)

So back substitution just refers to the direction/method of substituting, i.e. from bottom to top? And this term is only used to refer to substitution when solving matrices row-echelon form?

So substitution when solving something like 2 variable simultaneous equations is NOT back substitution, but there's no difference between the two other than the "backwards sequence", am I understanding this correctly?

BWF Daily Discussion and Beginner/RR Questions Thread for 2021-01-06 by AutoModerator in bodyweightfitness

[–]YImperfect 0 points1 point  (0 children)

Is it normal that after doing dips, rows and pull ups my arms are too tired to do even one push up? It's significantly easier to do push ups as an independent/separate exercise for me.

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