Timeline for Where did mess up while calculating the expected value of the momentum squared?

11 events

when toggle format	what		by	license	comment
Dec 27, 2018 at 20:51	comment	added	pppqqq		Hi @Isaac and welcome on this site. You already have an answer below, but I would suggest you also to check that your final answer ($\langle p^2 \rangle= -\hbar a m +4 (am)^3$) is dimensionally inconsistent. That should allow you to easily go back and trace the error in your calculation.
Dec 27, 2018 at 20:46	vote	accept	Isaac Spivack
Dec 27, 2018 at 20:24	answer	added	Alberto Navarro		timeline score: 0
Dec 27, 2018 at 19:43	history	edited	Qmechanic♦	CC BY-SA 4.0	edited body; edited tags
Dec 27, 2018 at 18:58	history	edited	Isaac Spivack	CC BY-SA 4.0	deleted 2 characters in body
Dec 27, 2018 at 18:50	comment	added	Isaac Spivack		Ah, right, fixed.
Dec 27, 2018 at 18:50	history	edited	Isaac Spivack	CC BY-SA 4.0	deleted 2 characters in body
Dec 27, 2018 at 18:19	comment	added	Javier		That $x$ shouldn't be there in the second derivative - you just get a quadratic and a constant term.
Dec 27, 2018 at 18:18	history	edited	Kyle Kanos	CC BY-SA 4.0	added 219 characters in body; edited tags
Dec 27, 2018 at 18:10	review	First posts
Dec 27, 2018 at 18:17
Dec 27, 2018 at 18:08	history	asked	Isaac Spivack	CC BY-SA 4.0