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The height above the ground or water of the base of the lowest layer of cloud below 6000 meters (20,000 feet) covering more than half the sky. [2] United Kingdom The vertical distance from the elevation of an aerodrome to the lowest part of any cloud visible from the aerodrome which is sufficient to obscure more than half of the sky. [3] United ...
2.5 m – distance from the floor to the ceiling in an average residential house [118] ... 1.75 m – (5 feet 8 inches) – height of average U.S. male human as of ...
Below are two tables which report the average adult human height by country or geographical region. With regard to the first table , original studies and sources should be consulted for details on methodology and the exact populations measured, surveyed, or considered.
One review of tall buildings suggests that residential towers may have 3.1 m (10 ft 2 in) floor height for apartments, while a commercial building may have floor height of 3.9 m (12 ft 9.5 in) for the storeys leased to tenants. In such tall buildings (60 or more storeys), there may be utility floors of greater height. [7]
The height of the cloud base can be measured using a ceilometer. This device reflects a beam of light off the cloud base and then calculates its distance using either triangulation or travel time . Alternatively, the cloud base can be estimated from surface measurements of air temperature and humidity by calculating the lifted condensation level .
R p = ventilation rate per person (cubic feet per minute (CFM) per person or cubic meters per minute per person) ACPH = Air changes per hour; D = Occupant density (square feet per occupant or square meters per occupant) h = Ceiling height (feet or meters) One cubic meter per minute = 16.67 liter/second
Ceiling height: 2 – 25 meters on average from the cave floor; Waters. River width: 1 – 2 meters; River water level altitude: 0.5 – 3 meters (high intensity ...
Most commercial jetliners have a service (or certified) ceiling of under 45,000 ft (13,700 m) [3] and some business jets about 51,000 ft (15.5 km; 9.7 mi). [4] Before its retirement, the Concorde supersonic transport (SST) (as well as the Tupolev Tu-144 before it was retired) routinely flew at 60,000 ft (18.3 km; 11.4 mi).