Search results
Results from the WOW.Com Content Network
In many cases the length of the unit was not uniquely fixed: for example, the English foot was stated as 11 pouces 2.6 lignes (French inches and lines) by Picard, 11 pouces 3.11 lignes by Maskelyne, and 11 pouces 3 lignes by D'Alembert. [47] Most of the various feet in this list ceased to be used when the countries adopted the metric system.
The reference wind pressure q is calculated using the equation q = ρv 2 / 2, where ρ is the air density and v is the wind speed. [19] Historically, wind speeds have been reported with a variety of averaging times (such as fastest mile, 3-second gust, 1-minute, and mean hourly) which designers may have to take into account.
1 inch per second is equivalent to: = 0.0254 metres per second (exactly) = 1 ⁄ 12 or 0.08 3 feet per second (exactly) = 5 ⁄ 88 or 0.056 81 miles per hour (exactly) = 0.09144 km·h −1 (exactly) 1 metre per second ≈ 39.370079 inches per second (approximately) 1 foot per second = 12 inches per second (exactly)
The troy ounce is the only unit of the system in current use; it is used for precious metals. Although the troy ounce is larger than its avoirdupois equivalent, the pound is smaller. The obsolete troy pound was divided into 12 ounces, rather than the 16 ounces per pound of the avoirdupois system.
2.2–3.4 3.3–5.0 × 10 −9 Average walking speed—below a speed of about 2 m/s, it is more efficient to walk than to run, but above that speed, it is more efficient to run.
Air, a mixture of oxygen and nitrogen, constitutes a non-dispersive medium. However, air does contain a small amount of CO 2 which is a dispersive medium, and causes dispersion to air at ultrasonic frequencies (greater than 28 kHz). [8] In a dispersive medium, the speed of sound is a function of sound frequency, through the dispersion relation.
These may be issued for an ongoing severe wind event (either by a derecho, or from an intense wind core or downburst within a squall line or supercell) containing winds greater than 80 mph (124 km/h or 70 knots), and/or extreme hail of 3 inches (76 mm) diameter or larger over a wide area. Specific to this product, the boilerplate PDS wording ...
[6] The statcoulomb (statC) or franklin (Fr) is a unit of electric charge equal to 1 dyn 1/2 ⋅cm, corresponding to ~ 333.564 pC. The statampere (statA) is a unit of electric current equal to 1 statC/s, corresponding to ~ 333.564 pA. The statvolt (statV) is a unit of electric potential difference equal to 1 erg/statC, corresponding to 299.792 ...