Posted by Rollie NE PA on January 25, 2019 at 17:05:33 from (108.57.53.132):
In Reply to: Minus 27 posted by 2510Paul on January 25, 2019 at 06:38:05:
Wind chill used to be based on the evaporation of moisture from the skin. The National weather service now uses a new formula. It uses calculated wind speeds at an average height of five feet (typical height of a human face) based on readings from the national standard height of 33 feet (typical height of an anemometer is based on the latest heat transfer theory, i.e, .heat loss from the body to its surroundings, during cold and breezy/windy days ; and uses a standard factor for skin tissue and assumes a no sunlight scenario.
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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