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Aerolics
Sound
Conversions
dB conversions
Electronics
Electrotechnics
Fluidics
Moment of mass inertia
Oleodynamics
Thermodynamics
Map of matters treated in the portal in English of the site.
Aerolics
Pressure drop in circular ventilation channels
Pressure drop in rectangular or squared ventilation channels
Hydraulic diameter
Fan electrical absorption
Air dynamic pressure
Sound
Dimensioning of cables for passive speakers
Audio cross-overs, low pass filter 6dB per octave
Audio cross-overs, band pass filter 6dB per octave
Audio cross-overs, high pass filter 6dB per octave
Audio cross-overs, low pass filter 12dB per octave
Audio cross-overs, band pass filter 12dB per octave
Audio cross-overs, high pass filter 12dB per octave
Audio cross-overs, low pass filter 18dB per octave
Audio cross-overs, band pass filter 18dB per octave
Audio cross-overs, high pass filter 18dB per octave
Dimensioning of coils for a ring inductor without core
Common information for components of a cross-over
Resonances or stationary waves in a room
Signal generator in low frequency
Decibel conversions
Conversion voltage gain or attenuation to decibel (dBV)
Conversion gain or attenuation in power to decibel (dBW)
Electronics
PCB trace width calculation
Heatsink in free air
Heatsinks on PCB
Heatsink with forced circulation
Resonant frequency of a L-C circuit
Calculation resistors in parallel
Calculation of resistors in series
Not stabilized DC power supply with one half-wave rectifier
Not stabilized DC power supply with a full-wave rectifier (Graetz bridge)
Not stabilized DC power supply with a double half-wave rectifier
Stabilized DC power supply with linear voltage regulator
Capacitive reactance
Inductive reactance
Calculation of not commercial capacitor or realized directly on PCB
Calculation capacitors in series
Voltage regulator with zener diode parallel to the load
LED dropping resistor
Minimal security distance for traces of a PCB
Moment of mass inertia (rotating masses)
Solid vert. cylinder rotating around its axis
Solid vert. cylinder rotating around an external axis
Hollow vert. cylinder rotating around its axis
Hollow vert. cylinder rotating around an external axis
Solid horiz. cylinder rotating around an axis passing through the center
Solid horiz. cylinder rotating around an external axis
Hollow horiz. cylinder rotating around an axis passing through the center
Hollow horiz. cylinder rotating around an external axis
Parallelepiped rotating around its central axis
Parallelepiped rotating around an external axis
Parallelepiped rotating around any axis
Mass concentrated in a point external from the rotating axis
Mass considered on a circumference
Propagation of the moment of inertia
Conversions
Acceleration
Angle
Area
Area (agricultural)
American wire gauge (AWG)
Capacitance
Density
Dielectric rigidity - perforation voltage
Dynamic viscosity
Electric charge
Electric current
Energy
Energy density on volume
Flow rate (coefficient)
Flow rate (mass)
Flow rate (volume)
Force
Fractions of inches
Frequency and Wavelength
Fuel consumption
Gain
Illuminance
Inductance
Induction
Information (information technology)
Kinematic viscosity
Length
Length (computer and printers)
Linear density
Luminance
Luminous intensity
Magnetic-flux
Magnetization
Mass - weight
Materials hardness
Mechanical stress
Moment of inertia
Moment - torque
Power
Power density
Pressure - push
Radioactivity
Resistance - conductance
Rotation speed
Specific heat
Specific volume
Speed
Temperature
Thermic transmission
Torsion
Velocity (information technology)
Voltage
Volume - capacity
Water hardness
Electrotechnics
Short circuit (PSCC) in mono-phase lines
Dissipation in free air of electrical cabinets
Forced ventilation (cooling) for electrical cabinets
Power factor correction (PFC) of electrical systems monophase and three-phase lines
Temperature of a conductor in free air subjected to a current
Calculation of parameters of electric or not electric motors
Supply a three-phase motor with AC mono-phase current
The lead-sulfuric acid accumulators (Pb - H2SO4)
Fluidics
Pressure drop in pipes
Waterhammer or peak of overpressure
Calculation of volume of tanks, reservoirs, silos or other holding tanks
Time for emptying tanks and reservoirs
Absorption of a pump
Oleodynamics
Pressure drop in oleodynamic pipes
Water hammer in hydraulic systems
Termodynamics
Continuous electric heating of fluids
Continuous electric heating of gas
Calculation of heat transfer coefficient and energy cost for fixtures
Electric heating of water or other fluids with tank
