hmparticle9's latest activity
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HThe right-hand is not a correct first-order approximation to the left-hand side. The expression ##2-2\delta + \delta^2## can be...
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HSince the numerator of ##F_{right}## has a factor ##(1-\delta)##, it will be easier to first simplify ##\dfrac{1-\delta}...
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Hhmparticle9 replied to the thread 5 charges within a square boundary.$$\frac{1-\delta}{[2(1-\delta)]^{\frac{3}{2}}} = \frac{1}{2^{\frac{3}{2}}} (1-\delta)^{-\frac{1}{2}} \approx \frac{1}{2^{\frac{3}{2}}}...
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Hhmparticle9 reacted to Nugatory's post in the thread I More information on the momentum eigenstate in the position basis with
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The text inside a ket is merely a label, so in general we need to know what convention is being used to assign labels to know what is... -
Hhmparticle9 posted the thread I More information on the momentum eigenstate in the position basis in Quantum Physics.The following sentence appears in my book (Introduction to Quantum Mechanics by Griffiths (3rd Edition)) : "## \langle x | p \rangle ##...
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Hhmparticle9 replied to the thread 5 charges within a square boundary.Hey all. I think I need a bit of a push with this one. I have tried $$2 - 2\delta + \delta^2 \approx 2(1-\delta)^2$$ to try and get rid...
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HWhen making the approximations for small ##\delta##, you cannot neglect ##\delta## in the denominators as you could in the perturbation...
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Hhmparticle9 posted the thread 5 charges within a square boundary in Introductory Physics Homework Help.In the first case, by perturbing by some ##\delta## we obtain a force $$F = \frac{1}{\pi \epsilon_0 (\delta^2 +...
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Hhmparticle9 replied to the thread Two charged spheres connected to walls by two springs.Thanks guys :) Slowly I think I am getting a bit better at physics (very slowly) thanks to you guys. $$F_e = \frac{q^2}{4 \pi...
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Hhmparticle9 replied to the thread Two charged spheres connected to walls by two springs.Is my attempt above close or way off? I would like to know why I am incorrect before moving on to another solution method. No. I cannot...
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Hhmparticle9 replied to the thread Two charged spheres connected to walls by two springs.Suppose if we perturb the sphere on the left by a small amount ##x## to the right. Then the sphere on the left will experience a force...
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Hhmparticle9 posted the thread Two charged spheres connected to walls by two springs in Introductory Physics Homework Help.I have found the spring force constant $$k= \frac{q^2}{8\pi \epsilon_0} \frac{1}{a^3}$$ but I can not get off the ground with finding...
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Hhmparticle9 replied to the thread Finding the charge on pith balls.Yes, my bad. I was thinking that @jbriggs444 had a different solution method and I am all ears.
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Hhmparticle9 replied to the thread Finding the charge on pith balls.So I get $$T \sin \frac{\theta}{2} = F_e \text{ and } T \cos \frac{\theta}{2} = mg$$ Dividing and rearranging I get $$mg \tan...
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HWhy would you set the electrostatic force equal to the gravitational force? Are they in the same direction?