Science & Engineering guides

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Science & Engineering Bearing Types Reference Radial, thrust, tapered, needle — when to use each bearing type. Science & Engineering Chemical Elements Properties Physical properties of common elements — melting, boiling, density, and key uses. Science & Engineering Combustion Energy Chart Heat of combustion for common fuels and foods — per unit mass and per unit volume. Science & Engineering Density of Common Materials Density of common solids, liquids, and gases in g/cm³ and kg/m³. Science & Engineering Dimensionless Numbers Fluid, heat, and mass transfer dimensionless groups — Reynolds, Prandtl, Nusselt, and more. Science & Engineering Earth Atmosphere Layers Atmospheric layers — altitude, temperature profile, pressure, and what happens there. Science & Engineering Earth Constants Physical and orbital constants of Earth — radius, mass, gravity, magnetic field, atmosphere. Science & Engineering Electromagnetic Spectrum Reference Full EM spectrum — frequency, wavelength, and typical uses from radio to gamma. Science & Engineering Environmental Standards Major environmental / product compliance standards — RoHS, REACH, WEEE, Conflict Minerals. Science & Engineering Error Propagation Guide How measurement uncertainties combine — sum, product, and arbitrary functions. Science & Engineering Escape Velocity Reference Escape velocity formula, body-by-body table, and orbital speed relationships. Science & Engineering Fluid Dynamics Reference Bernoulli, continuity, Reynolds number, and key fluid dimensionless groups. Science & Engineering Fuel Properties Common liquid and gaseous fuels — density, energy density, flash point, octane / cetane. Science & Engineering Gas Laws Reference Ideal gas law, Boyle, Charles, Gay-Lussac, and Avogadro — with real-gas corrections. Science & Engineering Hardness Conversion Chart Cross-reference Rockwell C (HRC), Rockwell B (HRB), Brinell (HBW), Vickers (HV), and approximate tensile strength for steel. Based on ASTM E140. Science & Engineering Humidity & Dew Point Chart Relative humidity, dew point, comfort zones, and condensation thresholds. Science & Engineering Laws of Thermodynamics The zeroth through third laws — with plain-language explanations and key equations. Science & Engineering Magnetic Units Reference Magnetic field and flux units — tesla, gauss, weber, maxwell, and typical values. Science & Engineering Material Properties Table Density, tensile strength, Young's modulus for common engineering materials. Science & Engineering Mechanical Leverage Table Six simple machines — lever, wheel, pulley, wedge, screw, incline — and their mechanical advantage. Science & Engineering Mechanical Units Conversion Force, pressure, torque, energy, power — imperial ↔ metric conversion factors. Science & Engineering Moment of Inertia Table Moments of inertia for common shapes — about centroidal axes. Science & Engineering Optical Lens Formulas Thin-lens and magnification formulas, plus common photographic relations. Science & Engineering Optics & Light Wavelengths Visible-spectrum wavelengths, laser bands, and common photonic emitters. Science & Engineering Periodic Table Searchable element table — symbol, atomic number, mass, category, and key properties. Science & Engineering Physics Constants Reference Fundamental physical constants — CODATA 2018 values and common derived quantities. Science & Engineering Planetary Atmospheres Atmosphere composition and surface pressure for planets and select moons. Science & Engineering Planetary Data Table Solar system planet data — mass, radius, distance, orbital period, gravity, and temperature. Science & Engineering Planetary Gravity Table Surface gravity of planets, moons, and smaller bodies — m/s² and relative to Earth. Science & Engineering Solar Irradiance Chart Solar irradiance reference — extraterrestrial, AM1.5, typical insolation by region. Science & Engineering Speed of Light Conversions c in various units, light-travel distances, and fiber/cable propagation delays. Science & Engineering Spring Constants Reference Hooke's law, helical coil spring formulas, series / parallel rules. Science & Engineering Thermal Conductivity Chart Thermal conductivity (k) of common materials — metals, insulators, fluids, and building materials. Science & Engineering Thermal Expansion Coefficients Linear thermal expansion (α) for common materials — metals, polymers, ceramics, composites. Science & Engineering Water Properties Physical and thermodynamic properties of water — density, viscosity, specific heat, phase transitions.