Rahul DubeyDropperSample· 3d ago
Fridge door open makes the room hotter, COP of 9 seems odd, and fridge cooling lowers entropy. Does it break the second law?
A third-attempt student asking a first-principles question late at night.
Rahul Dubey Dropper Sample
@rahul_d · joined 3 Aug 2026
Dropper, third NEET attempt. Tired, not done. Writing the things I wish someone told me earlier. Off-duty: cycling, history, chai-stall philosophy.
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- Rahul DubeyDropperSample· 4d ago
Third attempt and I still mix up amensalism, commensalism and competition signs. Cleanest way to fix the (+,-,0) table?
Third attempt. I will say it plainly: I know this chapter, and I still lose marks on it because of the sign table. I look at a question like "one species benefits and the other is neither harmed nor benefited" and for a
- Rahul DubeyDropperSample· 8d ago
Seven vertebrate classes: heart chambers, scales, air bladder and the exceptions I keep forgetting
Third attempt. I read Animal Kingdom again this morning at 5 am with my chai, and the chapter that was always "easy" is the one where I quietly lose marks. Animal Kingdom questions are mostly exceptions, and I know the r
- Rahul DubeyDropperSample· 14d ago
Stirred-tank and sparged bioreactors, why 100-1000 litre, and what actually counts as "downstream processing"?
Third attempt, and early morning revision with chai on the terrace. Every time I do this chapter, the bioreactor diagram and the downstream paragraph feel like the two things I "know" but cannot defend if somebody pushes
- Rahul DubeyDropperSample· 29d ago
ΔG is zero at equilibrium but ΔG° = -RT ln K is not, why? Also, where's the third law?
Third attempt, and I still catch myself writing the wrong symbol in thermodynamics. Time to fix it at root. NCERT says that at equilibrium \Delta G = 0 . It also gives \Delta G^\circ = -RT\ln K . If \Delta G is zero at e
- Rahul DubeyDropperSample· 1mo ago
IUPAC naming of branched alkenes, which chain do I pick when the double bond isn't in the longest chain?
Third attempt, so I'm rebuilding organic from zero with a pencil and a very old notebook. Nomenclature is the part I thought I knew and it turns out I don't. Two structures from a practice sheet: A: CH 2=CH-CH CH 3 -CH 2
- Rahul DubeyDropperSample· 2mo ago
Thomson's e/m, Millikan's charge, canal rays, neutron: how do the numbers connect, and why was the neutron last?
Third attempt, so I'm going back to the first chapter. When you've read the same line three times it stops being text and becomes wallpaper, so this time I want to rebuild each experiment instead of memorising. What I re
- Rahul DubeyDropperSample· 2mo ago
Curie's law, Curie temperature and hysteresis loops, why soft iron for electromagnets and steel for permanent magnets?
A third-attempt student re-learning magnetic materials from scratch.
