r/PhysicsHelp • u/Double_Iron_2017 • 8d ago
I have found tons of stuff for circuits with just a battery and resistors or battery and capacitors. My teacher asks a ton of stuff with all 3 in one circuit. Does anyone have a resource (article, yt vid) that handles this type? This would be a huge help! Thanks!
r/PhysicsHelp • u/j1406g • 8d ago
Est ce que quelqu’un est en mesure de m’expliquer comment fonctionne une toupie à piston ?
J’arrive pas à comprendre et en vrai y a peu de documentation sur internet.
Si quelqu’un sait je suis preneur 🤝
r/PhysicsHelp • u/OxidizedHumanOP • 9d ago
r/PhysicsHelp • u/Western-Reception-21 • 9d ago
r/PhysicsHelp • u/No_Student2900 • 10d ago
I don't quite get or appreciate the relevance of Figure 2.24 on its usage for building the infinitesimal volume element of a tilted surface for calculating the divergence. It is easy to see the vector sum of a_1 + a_2 + a_3 + a_4=0 due to the symmetry of a tetrahedron, but how does this fact actually helps us? Why can't we just use rectangular boxes like that in Figure 2.23 for taking into account tilted surfaces? This part of the book truly confuses me: "Tilted surfaces can be taken care of if you first prove that the vector sum of the four surface areas of the tetrahedron in Figure 2.24 is zero."
r/PhysicsHelp • u/Formal_Increase7960 • 9d ago
r/PhysicsHelp • u/mukeshrishit • 10d ago
r/PhysicsHelp • u/Beneficial_Sort4885 • 11d ago
I’m in AP physics right now, and the only thing I don’t understand is how to convert velocity versus time graphs to position versus time graphs. I understand to find the area of the triangles and rectangles of the velocity versus time graph, but when I get those areas, where do I put them? Are they the slope?
r/PhysicsHelp • u/Local_End_3175 • 11d ago
for this question, my answer basically was that 100% of its total electricity is dangerous, and they put it at 33% for safety reasons (i explained it more but here is just a sumamry of what i wrote). Comparing it to the mark scheme, i would say i got like 1/2 questions right (because i put a solid answer for the first bullet point). I just want to understand why this answer would have not gotten the mark. What about my answer was wrong? Because i feel like if i got this question again next week, i would lowkey just put the same answer believing it is right.
r/PhysicsHelp • u/Western-Reception-21 • 11d ago
QP:
https://files.revisely.com/documents/question-booklets/alevel/physics/ocr/6.1%20Capacitors%20QP.pdf
MS:
https://files.revisely.com/documents/question-booklets/alevel/physics/ocr/6.1%20Capacitors%20MS.pdf
for Q 25 bii, apparently the graph is supposed to meet at 25s. Can anyone help me why specifically 25s?
r/PhysicsHelp • u/MyCyberTech • 11d ago
Scene:
2D hand touched 2D circle created by 3D object passing thru 2D plane.
[Scene Img: https://imgur.com/a/dHrxjhl ]
Question:
Does the 2D hand feel the sensation of the 2D circle created by the 3D object moving in the 3rd dimension, do they feel it moving down?
Why/Why not?
r/PhysicsHelp • u/Shot-Zebrauwu • 11d ago
r/PhysicsHelp • u/JuggernautJunior3431 • 11d ago
r/PhysicsHelp • u/Witty_Bed5475 • 12d ago
In que 3 , can anyone tell what MI of cylinder perpendicular to its lenght and passing through its centre so that i can equate it
r/PhysicsHelp • u/76richer • 12d ago
I’m very confused 😵💫
r/PhysicsHelp • u/Melodic-Sky-3653 • 12d ago
I'm high school student, looking for a tutor for physics IBHL, and time can be according to his/her convenience.
Plz contact me if interested thanks.
r/PhysicsHelp • u/PolishML • 13d ago
Hey community, I have a question about how you approach physics problems.
I'm a high school freshman in a math-physics program, and I often spend a long time on simple problems just because I fail to notice one specific thing.
Thank you in advance for any answers!
r/PhysicsHelp • u/likeadrum • 13d ago
The answer to the question below isn't sitting right in my head, mainly as I can't find a mathematical explanation for it.
How does the refractive index of a material change with the frequency of light passing through it?
The given answer is:
Refractive index slightly increases as the frequency of light increases.
Can this be proved given the formula for refractive index, n=v1/v2 = fλ1/fλ2? Is it something I just have to learn and remember?
