Learn: Class 8 to 12
Tools for each class, topic by topic. Each tool lets you change the numbers and watch what happens, with a level switch so one tool can serve several classes.
Classes
Class 8 Coming soon
Science and maths.
- Science: force and pressure, light, sound, materials, cells
- Maths: numbers, algebra, shapes and data
Class 9 Coming soon
Science and maths.
- Science: motion, gravitation, atoms and molecules, cells and tissues
- Maths: number systems, polynomials, geometry, statistics
Class 10 Coming soon
Science and maths.
- Science: light and lenses, electricity, chemical reactions, life processes
- Maths: quadratic equations, trigonometry, probability
Class 11 Coming soon
Physics, chemistry, biology and maths.
- Physics: motion, laws of motion, waves, heat
- Chemistry: atoms, bonding, equilibrium
- Biology: cells, plants, the human body
- Maths: functions, sequences, limits
Class 12 Coming soon
Physics, chemistry, biology and maths.
- Physics: electric fields, current, optics, atoms
- Chemistry: solutions, kinetics, electrochemistry
- Biology: genetics, evolution, ecology
- Maths: calculus, vectors, probability
Already on fibub
Equation balancer #79 Balance any chemical equation, including ionic and redox ones, check the atoms on both sides, then find the limiting reagent, the theoretical yield, what is left over and your percent yield. Molar mass calculator #78 Type any formula, including brackets, hydrates, isotope labels and charges, for its molar mass, exact mass, percentage of each element, and a grams, moles and particles converter. Gas law calculator #83 Work out pressure, volume, amount or temperature of a gas in any units, with the mass and density of a named gas, the van der Waals real-gas answer and how far the ideal gas law is off. Radioactive decay and specific activity calculator #99 Activity of F-18, Tc-99m, I-131, C-14, P-32 and 28 more nuclides (or any half-life) at any date and time, a printable decay table, when it falls to a given activity, carrier-free specific and molar activity, and the labelled fraction of your sample. Bq, MBq, GBq, µCi, mCi and Ci. Water wave calculator #139 From a wave's period, height and the water depth, get the wavelength (solving the dispersion relation exactly), phase and group speed, energy and power, orbital velocity at the bed, then follow the wave into shallow water with shoaling and refraction to find where and how high it breaks, and the breaker type. Uncertainty propagation calculator #25 Type your formula and your measurements with their uncertainties, or paste repeated readings. Get the result with its uncertainty, which input matters most, and a Monte Carlo check.
Learn follows the topics of the NCERT books used for Class 8 to 12 in India, so students can practise what they study at school. fibub is an independent free site, not part of NCERT, and it doesn't copy textbook text or pictures. Like every fibub tool, everything runs in your browser: no sign-up, nothing about you is saved.