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159 Articles
Math & Science
Articles filed under Math & Science.
Showing 85–105 of 159 articles
📐 Math & Science
How to Solve a Two-Variable Linear Programming Problem
Enter an objective function and constraints to find the optimal solution for a two-variable linear programming problem, entirely in your browser.
💧 Math & Science
How to Solve Fluid Pressure With Bernoulli's Equation
Enter fluid velocity, height, and pressure at two points to solve for an unknown using Bernoulli's equation, entirely in your browser.
🌀 Math & Science
How to Tell if a Flow Is Laminar or Turbulent
Calculate Reynolds number from velocity, characteristic length and viscosity, and read what the value implies for pipe flow and other geometries.
calculator Math & Science
How to Use Bayes Theorem
Calculate conditional probability with Bayes theorem so the updated likelihood is easier to inspect.
chart Math & Science
How to Visualize Fractions
Visualize a fraction as a shaded bar and convert it into a mixed number or percentage so the value is easier to understand.
📉 Math & Science
How to Work Out a Survey's Margin of Error
Calculate margin of error from sample size and confidence level, find the sample needed for a target margin, and know what the figure doesn't cover.
💧 Math & Science
How to Work Out Dew Point and Wet Bulb
Calculate dew point, wet bulb and absolute humidity from temperature and relative humidity, and predict where condensation will actually form.
🍂 Math & Science
How to Balance Carbon and Nitrogen in Compost
Get a compost heap into the 25:1 to 30:1 carbon-to-nitrogen range that heats properly, and fix the ammonia smell or the heap that does nothing.
🧪 Math & Science
How to Browse the Periodic Table Interactively
Browse, search, and filter all 118 chemical elements by category, with atomic number, mass, group, and period details, instead of a static wall chart.
📊 Math & Science
How to Calculate a Confidence Interval for a Sample Mean
Enter a sample mean, standard deviation, and sample size to get the confidence interval at 90%, 95%, or 99%, entirely in your browser.
📡 Math & Science
How to Calculate an RF Link Budget
Add up transmit power, antenna gains and path loss to get a received signal level and link margin, and know what free-space maths leaves out.
🧮 Math & Science
How to Calculate Binary AND, OR, and XOR
Use a binary operations calculator to check AND, OR, XOR, and bit shifts with decimal inputs, padded binary output, and clear side-by-side working results.
🧪 Math & Science
How to Calculate Buffer pH With Henderson-Hasselbalch
Use the Henderson-Hasselbalch equation to find buffer pH from acid and conjugate base concentrations, and see why dilution barely changes the result.
🏀 Math & Science
How to Calculate Projectile Range and Flight Time
Work out the range, flight time and maximum height of a projectile from its launch speed and angle, and understand which assumptions the standard equations rely on.
🛰️ Math & Science
How to Calculate Relativistic Time Dilation
Work out time dilation from velocity using the Lorentz factor, see why it's negligible below a tenth of light speed, and how GPS depends on both effects.
🧊 Math & Science
How to Calculate Surface Area
Use a surface area calculator for cubes, spheres, cylinders, cones, and prisms with formulas, dimensions, units, and clear result checks for homework.
📐 Math & Science
How to Calculate the Area of a Trapezium
Work out trapezium area, perimeter and midsegment from the parallel sides and height, and avoid the slanted-leg mistake that ruins most attempts.
🌡️ Math & Science
How to Calculate the Energy to Heat Something
Use Q = mcΔT to find the energy needed for a temperature change, convert it to kWh, and know why phase changes need a separate calculation entirely.
➗ Math & Science
How to Convert a Decimal Into a Simplified Fraction
Enter a decimal number and get its simplified fraction, reduced to lowest terms, entirely in your browser.
⚡ Math & Science
How to Convert Between kW, kVA and Amps
Calculate three-phase current and apparent power from voltage, load and power factor, and understand where the square root of three comes from.
🔬 Math & Science
How to Count and Round Significant Figures
Use a significant figures counter to identify significant digits, round a number to a chosen precision, and review a clear explanation of the final result.