Acid Base Salt Practice vs Relativity Simulator

Acid Base Salt Practice is an educational application designed to help students prepare for NEET and JEE examinations through structured practice in acid–base chemistry and ionic equilibrium. The app provides chapter-wise quizzes, mock tests, and daily practice questions aligned with competitive exam syllabi. Students can solve conceptual and numerical problems, attempt mock tests for comprehensive assessment, and monitor performance using statistics. The app supports systematic revision and exam-focused practice in physical chemistry. Topics Included 1. Fundamental Concepts of Acids and Bases Arrhenius, Brønsted–Lowry, and Lewis theories, acidic and basic strength, and amphoteric substances. 2. Ionization and Dissociation Degree of ionization, Ostwald dilution law, ionization constants (Ka and Kb), pKa and pKb, and common ion effect. 3. pH and pOH Concept Definition of pH and pOH, pH scale, pH–pOH relation, strong and weak acid pH calculations. 4. Buffer Solutions Acidic and basic buffers, Henderson equation, buffer action mechanism, buffer capacity, and numerical problems. 5. Hydrolysis of Salts Salt hydrolysis, hydrolysis constant, pH of salt solutions, acidic and basic salts, and numerical calculations. 6. Acid–Base Titrations Neutralization reactions, equivalence and end points, indicators, strong acid–strong base titration, and numerical problems. 7. Ionic Equilibrium – Advanced Concepts Water ionization, ionic product (Kw), solubility product (Ksp), common ion effect, precipitation conditions, and pH during titration. 8. NEET & JEE Advanced Focus Mixed equilibrium problems, hydrolysis numericals, buffer and titration curve analysis, logarithmic approximations, assertion–reason questions, and frequently tested competitive concepts. Key Features Chapter-wise practice quizzes Mock tests for full syllabus assessment Daily quiz for regular revision Performance statistics to track accuracy NEET & JEE aligned chemistry syllabus Simple and distraction-free interface Acid Base Salt Practice is suitable for students preparing for NEET and JEE who want structured practice in ionic equilibrium, pH calculations, buffer systems, and titration concepts.

Relativity Simulator is an interactive relativity toolkit built strictly on the axiomatic foundations of modern physics. There is no "hard sci-fi" here — every result traces back to the Lorentz transformation of special relativity or the Einstein field equations of general relativity, and is verified against numerical truth fixtures. 【Real physics, not imagination】 · 20 interactive modules covering core effects from special relativity to black holes, gravitational waves, and curved spacetime; · Each module ships with precise charts, adjustable parameters, and a "Theory Card" with a fully visible derivation chain; · All demo numbers are recomputed locally on your device from real CODATA constants — nothing is fabricated. 【Phenomena you can verify yourself】 · Gravitational time dilation: why clocks run faster up high — ~80 ns/day faster atop Everest, ~38 µs/day faster on GPS satellites; · Twin paradox: fly to 4.22 light-years at 0.8c and the Earth twin ages 10.5 years while the traveler ages only 6.3; · Tidal disruption: why you get stretched into "spaghetti" falling into a black hole — small holes tear you outside the horizon, supermassive ones only after you cross it; · Plus light bending, gravitational lensing, the Schwarzschild horizon, frame dragging, and mass–energy equivalence E=mc². 【Built for learning and teaching】 · Volume-based progression: kinematics → gravitational field → black holes → cosmology → applications; · Bilingual (zh/en) system notes ship with every effect: derivation, physical quantities, and references; · Chinese / English UI follows your system language. 【Privacy first】 The app collects, stores, and transmits no personal data, embeds no third-party SDKs, and runs every computation locally on your device. Whether you are studying, teaching, or simply curious, Relativity Simulator lets you actually run the "invisible spacetime" and watch it.