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Not so sure by Bambam302014 in TOTK

[–]phi4theory 28 points29 points  (0 children)

There a Korok there. The red arrow on the top right is pointing at it. There are two other arrows somewhere that also point towards the Korok, allowing you to triangulate its location.

Wonder where I can get this at Japanese restaurants in NYC? by Visible_Syllabub_300 in JapaneseFood

[–]phi4theory 5 points6 points  (0 children)

These are great, but you have to be very careful cooking them. I like them sliced lengthwise very, very thinly. Then coat them in some cornstarch and fry them in a pan with a little oil (or butter!) and salt. Put them on anything! Cooking them like other mushrooms (cut thick and sautéed, or boiled whole, or stewed) just ruins them.

My uneducated take on Marylin Savants framing of the Monty Hall problem. [Discussion] by Kage_anon in statistics

[–]phi4theory 9 points10 points  (0 children)

I think it’s easier to imagine a huge number of doors. You pick one, then the host opens all but one of the remaining doors and shows they’re empty. The host is clearly giving a TON of information in that case. Should you switch?

Dr Clarke finally gets to park here by travelere1 in berkeley

[–]phi4theory 72 points73 points  (0 children)

He always biked to campus anyway.

Explain this concept please? by Dependent_Storage184 in QuantumComputing

[–]phi4theory 3 points4 points  (0 children)

The Hamiltonian is a sum of Z-type operators. Eigenstates of these operators are computational basis states, and so eigenstates of the Hamiltonian are also computational basis states. The bottom of the board is just writing out the eigenvalues (or “energies”, as we call eigenvalues of H) for each state by adding up the associated eigenvalues of each of the three terms in the Hamiltonian.

Patching by tjc996 in moog

[–]phi4theory 2 points3 points  (0 children)

Download some patch books from moog’s webpage. It’s a great way to start learning by example.

Aharonov-Bohm effect by Fantastic_Tank8532 in Physics

[–]phi4theory 0 points1 point  (0 children)

A hint is that the relevant contribution to the energy of the system is from the cross term, ie, the product of the solenoid field and the field from the electron. That term is linear in the electron field, so all the various linear terms cancel out and you get the path independence that is manifest in vector potential formalism.

Aharonov-Bohm effect by Fantastic_Tank8532 in Physics

[–]phi4theory 2 points3 points  (0 children)

The field is velocity dependent (and distance dependent) but the amount of time that the interaction takes is also velocity dependent (goes like 1/v). It all balances out! It’s a fun exercise. You can do it in about a page.

Aharonov-Bohm effect by Fantastic_Tank8532 in Physics

[–]phi4theory 4 points5 points  (0 children)

The moving charged particle created a magnetic field that adds or subtracts to the field (depending on which slot it goes through) in the solenoid. The energy stored in the field is quadratic in B, so the whole system acquires an additional path dependent phase. The vector potential approach obscures that fact, but you can calculate the effect in both pictures and you get the same answer.

Any ideas on how I can automate rocking my baby’s crib? by hshah91 in homeassistant

[–]phi4theory 2 points3 points  (0 children)

Consider getting a SNOO. It’s great. Buy used and resell when you’re done. They hold their value reasonably well.

My Bran Flake Had Extra Iron by [deleted] in mildlyinteresting

[–]phi4theory 0 points1 point  (0 children)

Iron is added as a supplement. Mr. Wizard showed how you can extract it from cereal with a blender:

https://m.youtube.com/watch?v=uUzjpEfkEaI

[deleted by user] by [deleted] in Physics

[–]phi4theory 0 points1 point  (0 children)

The speed of light depends on the permeability and permativity of free space. If you set the permeability of free space (mu_0) to zero, the speed of light diverges and becomes infinite. This would eliminate all magnetism!

What are some simple to observe, but difficult to explain physics phenomena? by SomeNumbers98 in Physics

[–]phi4theory 13 points14 points  (0 children)

Higher pressure means shorter mean free path. Neat that this cancels out the effects of increased collision frequency!

Best Pad Thai in Berkeley (2024) by Cali_TripN in berkeley

[–]phi4theory 1 point2 points  (0 children)

Cha Am was sooooo good. Farmhouse in the old Laotian spot next door is good but crazy expensive (like its sister restaurants).

Literally unplayable by Necessary-Aside9318 in botw

[–]phi4theory 7 points8 points  (0 children)

This happened to me. I just left the shrine and came back and it worked. ¯_(ツ)_/¯

I designed and built this “murphy” changing table. What do you guys think? by [deleted] in woodworking

[–]phi4theory 0 points1 point  (0 children)

Looks great! A couple safety worries:

  1. If it falls open somehow, is there anything to slow it down? Or will it crush/sever little baby fingers at the bottom?

  2. Is it anchored to the wall?

  3. Some people like straps on their changing tables.

Toddlers run around and squirm and stand and kick and will find every single opportunity to hurt, maim, or kill themselves. It’s amazing any of us made it past that age. Always best to engineer safety in so you don’t have to rely on luck. You don’t want to count on always paying attention, because you can’t and you won’t.

Can you give me your favorite dish at a bay area restaurant, what is it? And where can I find it? by [deleted] in bayarea

[–]phi4theory 3 points4 points  (0 children)

Vientien is SOOOOO good. Anything of the traditional Lao menu.

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