cosine of an angle
51versed sine — noun Etymology: versed from New Latin versus turned (from past participle of Latin vertere to turn) + English ed : 1 minus the cosine of an angle * * * Trig. one minus the cosine of a given angle or arc. Abbr.: vers. Also called versine, versin.… …
52Pyranometer — A pyranometer is a type of actinometer used to measure broadband solar irradiance on a planar surface and is a sensor that is designed to measure the solar radiation flux density (in watts per metre square) from a field of view of 180 degrees.… …
53Heliodon — A heliodon (HEE leo don) is a device for adjusting the angle between a flat surface and a beam of light to match the angle between a horizontal plane at a specific latitude and the solar beam. Heliodons are used primarily by architects and… …
54Sniper — For other uses, see Sniper (disambiguation). Sniper US Army sniper team shooting from within a room in Afghanistan with M24 SWS, 19 October 2006. Occupation Names Sniper Activity …
55Classical central-force problem — In classical mechanics, the central force problem is to determine the motion of a particle under the influence of a single central force. A central force is a force that points from the particle directly towards (or directly away from) a fixed… …
56law of cosines — Trigonom. 1. a law stating that the square of a side of a plane triangle is equal to the sum of the squares of the other two sides minus twice the product of the other sides multiplied by the cosine of the angle between them. 2. a law stating… …
57Insolation — is a measure of solar radiation energy received on a given surface area in a given time. It is commonly expressed as average irradiance in watts per square meter (W/m²) or kilowatt hours per square meter per day (kW·h/(m²·day)) (or hours/day). In …
58Vignetting — In photography and optics, vignetting is a reduction of an image s brightness or saturation at the periphery compared to the image center. A similar effect occurs when filming projected images or movies off a projection screen, the so called… …
59Countersteering — For the similar technique used in automobiles, see Opposite lock. Graphs showing the lean and steer angle response of an otherwise uncontrolled typical bike, traveling at a forward speed in its stable range (in this case 6 m/s), to a steer torque …
60radiation — radiational, adj. /ray dee ay sheuhn/, n. 1. Physics. a. the process in which energy is emitted as particles or waves. b. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and… …
