Biotn.

Brit.

/ˈbiːəʊ/, U.S.

/ˈbioʊ/

Origin: From a proper name. Etymon: proper name Biot.

Etymology: < the name of Jean-Baptiste Biot (1774–1862), French physicist, astronomer, and mathematician. With sense 1 compare French nombre de Biot (1939 or earlier).

Physics.

I. attributive and in the genitive.

1. Biot number n. (also Biot's number) a dimensionless parameter used in calculations of heat transfer between a solid and a surrounding liquid or gas in a state other than a steady state.The Biot number is proportional to the ratio of the thermal resistance of the solid to that of the fluid adjacent to its surface.

ΚΠ

1942 W. H. McAdams Heat Transmission (ed. 2) iv. 95 (table) In the literature certain dimensionless groups have been named as follows:..Biot number.

1959 Nature 4 July 31/1 Thermal stresses depended mainly on total temperature change, acceleration and the Biot number.

1972 BioScience 22 658/3 A mouse-sized animal in a 240 cm/sec..wind speed environment would need to have a 1 cm thick fur layer to have a Biot Number greater than ten.

1978 Nucl. Engin. & Design 50 387 Numerical calculations are carried out for various combinations of Biot's number and the ratio of length to diameter of the cylinder.

2005 Y. A. Çengel & R. H. Turner Fund. Thermal-fluid Sci. (ed. 2) xviii. 812 A small Biot number represents small resistance to heat conduction, and thus small temperature gradients within the body.

II. Simple uses.

2. With lower-case initial. The unit of electrical current in the centimetre-gramme-second-electromagnetic unit system, equal to ten amperes; = abampere at ab- comb. form . Symbol Bi.

ΚΠ

1962 Physics Today June 30/2 The biot is that constant current intensity, which, when maintained in two parallel rectilinear conductors of infinite length and of negligible circular section, placed at a mutual distance of 1 centimetre apart in vacuo, would produce between these conductors a force of 2 dyne per centimetre length.

1969 Physics Educ. 4 10/1 The biot, symbol Bi, is a unit of electric current..having the value Bi = 10 A.

1996 R. E. Cohen Physics Quick Ref. Guide ii. 30 The abampere is also known as the biot (Bi).

This is a new entry (OED Third Edition, November 2010; most recently modified version published online December 2021).

单词	biot
释义	Biotn. Brit. /ˈbiːəʊ/, U.S. /ˈbioʊ/ Origin: From a proper name. Etymon: proper name Biot. Etymology: < the name of Jean-Baptiste Biot (1774–1862), French physicist, astronomer, and mathematician. With sense 1 compare French nombre de Biot (1939 or earlier). Physics. I. attributive and in the genitive. 1. Biot number n. (also Biot's number) a dimensionless parameter used in calculations of heat transfer between a solid and a surrounding liquid or gas in a state other than a steady state.The Biot number is proportional to the ratio of the thermal resistance of the solid to that of the fluid adjacent to its surface. ΚΠ 1942 W. H. McAdams Heat Transmission (ed. 2) iv. 95 (table) In the literature certain dimensionless groups have been named as follows:..Biot number. 1959 Nature 4 July 31/1 Thermal stresses depended mainly on total temperature change, acceleration and the Biot number. 1972 BioScience 22 658/3 A mouse-sized animal in a 240 cm/sec..wind speed environment would need to have a 1 cm thick fur layer to have a Biot Number greater than ten. 1978 Nucl. Engin. & Design 50 387 Numerical calculations are carried out for various combinations of Biot's number and the ratio of length to diameter of the cylinder. 2005 Y. A. Çengel & R. H. Turner Fund. Thermal-fluid Sci. (ed. 2) xviii. 812 A small Biot number represents small resistance to heat conduction, and thus small temperature gradients within the body. II. Simple uses. 2. With lower-case initial. The unit of electrical current in the centimetre-gramme-second-electromagnetic unit system, equal to ten amperes; = abampere at ab- comb. form . Symbol Bi. ΚΠ 1962 Physics Today June 30/2 The biot is that constant current intensity, which, when maintained in two parallel rectilinear conductors of infinite length and of negligible circular section, placed at a mutual distance of 1 centimetre apart in vacuo, would produce between these conductors a force of 2 dyne per centimetre length. 1969 Physics Educ. 4 10/1 The biot, symbol Bi, is a unit of electric current..having the value Bi = 10 A. 1996 R. E. Cohen Physics Quick Ref. Guide ii. 30 The abampere is also known as the biot (Bi). This is a new entry (OED Third Edition, November 2010; most recently modified version published online December 2021). < n.1942
随便看	θ135389 θ13539 θ135390 θ135391 θ135392 θ135393 θ135394 θ135395 θ135396 θ135397 θ135398 θ135399 θ1354 θ13540 θ135400 θ135401 θ135402 θ135403 θ135404 θ135405 θ135406 θ135407 θ135408 θ135409 θ13541