British thermal unit

British thermal unit,

abbr. Btu, unit for measuring heat quantity in the customary system of English units of measurementEnglish units of measurement,
principal system of weights and measures used in a few nations, the only major industrial one being the United States. It actually consists of two related systems—the U.S.
..... Click the link for more information. , equal to the amount of heat required to raise the temperature of one pound of water at its maximum density [which occurs at a temperature of 39.1 degrees Fahrenheit (&degF;) ] by 1&degF;. The Btu may also be defined for the temperature difference between 59&degF; and 60&degF;. One Btu is approximately equivalent to the following: 251.9 calories; 778.26 foot-pounds; 1055 joules; 107.5 kilogram-meters; 0.0002928 kilowatt-hours. A pound (0.454 kilogram) of good coal when burned should yield 14,000 to 15,000 Btu; a pound of gasoline or other fuel oil, approximately 19,000 Btu.

British thermal unit

(BTU)The amount of heat required to raise one pound of water 1 degree Fahrenheit in temperature—about the heat content of one wooden kitchen match.

British thermal unit

[′brid·ish ′thər·məl ‚yü·nət] (thermodynamics) Abbreviated Btu. A unit of heat energy equal to the heat needed to raise the temperature of 1 pound of air-free water from 60° to 61°F at a constant pressure of 1 standard atmosphere; it is found experimentally to be equal to 1054.5 joules. Also known as sixty degrees Fahrenheit British thermal unit (Btu_60/61). A unit of heat energy that is equal to 1/180 of the heat needed to raise 1 pound of air-free water from 32°F (0°C) to 212°F (100°C) at a constant pressure of 1 standard atmosphere; it is found experimentally to be equal to 1055.79 joules. Also known as mean British thermal unit (Btu_mean). A unit of heat energy whose magnitude is such that 1 British thermal unit per pound equals 2326 joules per kilogram; it is equal to exactly 1055.05585262 joules. Also known as international table British thermal unit (Btu_IT).

British thermal unit

The amount of heat required to raise the temperature of 1 pound of water by 1 degree Fahrenheit. Abbr. Btu.

British thermal unit

unit

[u´nit] 1. a single thing; one segment of a whole that is made up of identical or similar segments.2. a specifically defined amount of anything subject to measurement, as of activity, dimension, velocity, volume, or the like.3. a distinct part of a hospital, usually having a specific physical location and serving a defined function; see under names of specific units.Ångström unit angstrom.atomic mass unit (u) (amu) the unit of mass equal to ¹⁄₁₂ the mass of the nuclide of carbon 12. Called also dalton.autonomous nursing unit a nursing unit under a decentralized administration system in which the staff is responsible for all aspects of unit functioning.British thermal unit (BTU) a unit of heat formerly widely used, being the amount necessary to raise the temperature of 1 pound of water from 39° to 40°F., equal to approximately 252 calories" >calories.CH50 unit the amount of complement that will lyse 50 per cent of a standard preparation of sheep red blood cells coated with antisheep erythrocyte antibody. continuing education unit (CEU) a unit of credit for educational offerings given to professional persons, determined by a professional organization according to a mathematical formula after a thorough review of the program of study, the qualifications of the instructors, and the program objectives.critical care unit intensive care unit.electrostatic u's (esu) that system of units that is based on the fundamental definition of a unit charge as one that will repel a similar charge with a force of 1 dyne when the two charges are 1 cm apart in a vacuum.environmental control unit a computerized system that allows the handicapped individual to operate several different appliances using a keyboard or other input device.heat unit the amount of heat energy that is produced by one kVp (kilovolt peak) and one mA (milliampere) for one second with single phase, full wave rectified radiographic equipment.Hounsfield unit an arbitrary unit of x-ray attenuation used for CT scans. Each voxel is assigned a value on a scale in which air has a value of −1000; water, 0; and compact bone, +1000.intensive care unit see intensive care unit.International unit (IU) 1. a unit of enzyme activity equal to the amount of enzyme that catalyzes the conversion of one micromole of substrate or coenzyme per minute under specified conditions (temperature, pH, and substrate concentration) of the assay method. Abbreviated U.2. any of several arbitrary units that have been adopted by international bodies to express the quantities of certain vitamins (A, C, D, and thiamine hydrochloride), hormones (androgen, chorionic gonadotropin, estradiol benzoate, estrone, insulin, progesterone, and prolactin), and drugs (digitalis and penicillin).Kienböck's unit a unit of x-ray exposure equal to 0.1 erythema dose; symbol X.motor unit the unit of motor activity formed by a motor nerve cell and its many innervated muscle fibers.postanesthesia care unit (PACU) a specialty unit in a hospital for giving care" >postanesthesia care (care of patients recovering from anesthesia and intravenous sedation); formerly called recovery room.radiologic u's units used to measure radiation, including roentgens, rads, rems, and curies.u's of service (UOS) 1. the number of procedures done by a department.2. individuals or groups of individuals who are the recipients of nursing care.short procedures unit (short term care unit) a nursing unit where patients are briefly cared for following a medical or surgical procedure and are then discharged without spending the night.SI unit any unit of the International System of units (the metric system" >metric system); see also si units.step-down unit a nursing unit designated to provide care for patients who are stable enough to be discharged from the intensive care unit but are not yet ready to be cared for on a medical-surgical unit.Svedberg unit (S) a unit equal to 10⁻¹³ second used for expressing sedimentation coefficients of macromolecules.Svedberg flotation unit (S_f) a unit equal to 10⁻¹³ second used for expressing negative sedimentation coefficients of macromolecules that float rather than sink in a centrifuge, e.g., lipoproteins.terminal respiratory unit the functional unit of the lung, including a respiratory bronchiole, alveolar ducts and sacs, and alveoli; called also primary lobule of lung and primary respiratory lobule.USP unit one used in the United States Pharmacopeia for expressing potency of drugs and other preparations.

Brit·ish ther·mal u·nit (BTU),

the quantity of heat required to raise 1 lb of water from 3.9°C to 4.4°C; equal to 251.996 calorie or 1055.056 J. Synonym(s): unit of heat (2)

British Thermal Unit

An obsolete unit, equal to 252 calories or 1055 Joules, for the amount of energy needed to raise the temperature of one pound of water by one degree Fahrenheit.

British Thermal Unit

A unit of energy–equal to 252 calories or 1055 Joules needed to raise one pound of water by one degree Fahrenheit

Brit·ish ther·mal u·nit

(BTU) (brit'ish thĕr'măl yū'nit) The quantity of heat required to raise 1 pound of water from 3.9-4.4°C; equal to 251.996 calories or to 1055.056 joules.

British thermal unit

British thermal unit

British thermal unit

Brit′ish ther′mal u′nit

Brit·ish thermal unit

British thermal unit

British thermal unit

British thermal unit,

British thermal unit

British thermal unit

British thermal unit

British thermal unit

unit

Brit·ish ther·mal u·nit (BTU),

British Thermal Unit

British Thermal Unit

Brit·ish ther·mal u·nit

British thermal unit

British Thermal Unit

British thermal unit (BTU)

British thermal unit

Synonyms for British thermal unit

noun a unit of heat equal to the amount of heat required to raise one pound of water one degree Fahrenheit at one atmosphere pressure

Synonyms

Related Words