62 results for “Speed”
How fast something moves.
How far something travels.
Speed of a wave from frequency and wavelength.
Speed equals distance divided by time.
Speed needed for a circular orbit.
Minimum speed to escape a gravitational field.
Constant fall speed when drag balances gravity.
Root-mean-square speed of gas molecules.
Ratio of light speed in vacuum to that in a medium.
Speed depends on tension and linear density.
Light speed from vacuum constants.
Speed of fluid leaving a hole at depth h.
Momentum at speeds near light.
Running speed in km/h from pace in min/km.
Minimum speed to escape a body's gravity.
Speed of a circular orbit.
Mechanical power from torque and angular speed.
Ratio of teeth (or speeds) between gears.
Rotational speed of an AC motor field.
Quick estimate: true airspeed increases about 2% per 1000 ft of altitude above indicated airspeed.
Ground speed is true airspeed adjusted for the headwind/tailwind component.
Time en route equals distance divided by ground speed.
Vertical speed is the altitude gained per unit time (ft per minute).
On a standard 3° glide path, required descent rate (fpm) is roughly ground speed (kt) times 5.
Aerodynamic lift produced by a wing depends on air density, speed squared, area and lift coefficient.
Minimum speed for level flight, set by maximum lift coefficient.
Accelerated stall speed rises with the square root of the load factor.
Radius of a level coordinated turn from speed and bank angle.
Ratio of true airspeed to the local speed of sound.
Local speed of sound (kt) as a function of absolute air temperature (Kelvin).
Maximum range of a jet aircraft from speed, efficiency, L/D and fuel fraction.
Approximate ground-roll distance assuming constant acceleration to lift-off speed.
Minimum speed to maintain lift.
Ratio of speed to the local speed of sound.
Vertical speed from excess engine power.
Airspeed corrected for altitude.
Power needed to sustain level flight equals drag times true airspeed.
Design maneuvering speed scales with stall speed and the square root of the limit load factor. Below Va, the wing stalls before it can overstress.
Equivalent airspeed relates true airspeed to sea-level dynamic pressure through the density ratio σ = ρ/ρ₀.
Approximate landing roll distance from touchdown speed and average deceleration.
Rule-of-thumb bank angle (degrees) for a standard-rate (3° per second) turn from true airspeed in knots.
Distance covered per unit time.
Time needed to cover a distance at a given speed.
Speed of an elastic wave through rock.
Speed of a shallow-water wave across the ocean.
Convert speed from km/h to mph.
Convert speed from meters per second to km/h.
Convert miles per hour to kilometers per hour.
Maximum speedup from parallelizing a fraction of a task.
Normalizes layer inputs across a mini-batch to speed and stabilize training.
Converts a Beaufort force number into an approximate wind speed.
Speed of a tsunami in the open ocean (a shallow-water wave relative to its wavelength).
Wavelength of a radio signal is the speed of light divided by its frequency; it sets antenna length and dish sizing.
Use the identity (a+b)(a-b) + b² = a² to square numbers quickly by going to the nearest easy number.
Memorize common fraction-to-decimal conversions for instant calculation.
Split large multiplications into simpler parts using the distributive property.
A quick way to verify multiplication and addition results by checking digit sums modulo 9.
For numbers a little above 100, use the surplus from 100 to multiply almost instantly.
Any percentage can be built from 10%, 5%, and 1% — quick to find and easy to combine.
Use (a+1)² = a² + 2a + 1. Square the round number below, add twice it, add 1.
Multiplying by 4 is doubling twice; by 8 is doubling three times. No memorised tables needed.