Stories and questions with this tag.
My checklist for System of Particles now has a "centre of mass positions" table, and I mixed up the entries. I need someone to help me check it and explain why the numbers differ. Distances from the centre of the flat fa
Between football practice and homework I just did a worksheet on Oscillations and got most of the 'which of these represent SHM' questions wrong, so I think I'm missing something simple. The ones I got confused on: 1. x
A question about balance points, driver cells and a gradient I cannot picture.
omg I love this chapter and I hate it. 😭 Excess pressure inside a liquid drop is \dfrac{2S}{r} and inside a soap bubble it's \dfrac{4S}{r} . Our teacher says the soap bubble has "two surfaces". But my brain says a bubble
Ahh I need help with a silly doubt that is not so silly. Motion in a Plane, scalars and vectors. NCERT says a vector has magnitude and direction. But current also has a direction we show the arrow in circuits! and yet it
I made a checklist for Gravitation and Kepler's laws is where my ticks stopped. Law 1: orbit is an ellipse with the Sun at one focus. Law 2: line joining the planet and the Sun sweeps equal areas in equal intervals of ti
Making notes for Electric Charges and Fields tables everywhere obviously!! and the first page already has me confused. NCERT lists the properties: additivity, conservation, quantisation. Quantisation says q = \pm ne with
Early morning revision, so forgive me if this is basic. NCERT says the radius of a nucleus is R = R 0A^{1/3}, \qquad R 0 = 1.2\text{ fm} and then it says the nuclear density is roughly the same for all nuclei, around 10^
Practical exam coming up and I want to actually understand it, not just copy the observation table. We find the focal length of a concave mirror and a convex lens by the u–v method. I place the object pin, get a real inv
Three doubts from the same chapter and my notes are inconsistent. 1. A body at 27°C is heated to 327°C. By what factor does the power it radiates Stefan's law increase? I did 327/27 ^4 \approx 21{,}000 and it's nowhere i
Started the Units and Measurements chapter and, being me, I made a checklist. NCERT says there are 7 base quantities in SI: length, mass, time, electric current, thermodynamic temperature, amount of substance and luminou
I'm stuck on the alpha scattering part of Atoms and my mental picture is clearly broken. NCERT says most alpha particles go straight through, a few get deflected by large angles and some even bounce back. Fine. Then it b
