A362000 Decimal expansion of the conventional value of watt-90 (W_{90}).

1, 0, 0, 0, 0, 0, 0, 1, 9, 5, 5, 3, 6, 5, 5, 4, 8, 3, 4, 9, 8, 9, 9, 3, 5, 9, 1, 8, 2, 6, 2, 5

Offset

1,9

Comments

Since the conventional volt (i.e., V_{90}, as stated in A361006) is the electromotive force measured against a Josephson effect standard using the defined value of the Josephson constant, K_{J-90}, and given the fact that the conventional ohm (i.e., Omega_{90}, as stated in A361010) is the electrical resistance measured against a quantum Hall effect standard using the defined value of the von Klitzing constant, R_{K-90} (see Wikipedia, "Conventional electrical unit", in Links), it follows that the conventional watt (i.e., W_{90}) is given by A_{90}*V_{90}, which is (K_{J-90}/K_J)^2*(R_{K-90}/R_K) according to the 2019 SI system in units W.

Links

Table of n, a(n) for n=1..32.

NIST Physics Laboratory, conventional value of watt-90

Wikipedia, Conventional electrical unit

Formula

W_{90} = ((483597.9*10^9/((2*1.602176634*10^(-19))/(6.62607015*10^(-34))))^2)*((25812.807)/((6.62607015*10^(-34))/(1.602176634*10^(-19))^2)) = 1 + 15642924386799194873461/80000000000000000000000000000 W.

Example

1.0000001955365548349899359182625.

Crossrefs

Cf. A248508, A248510, A361006, A361010, A361011.

Sequence in context: A199792 A193960 A195696 * A197838 A155534 A154683

Adjacent sequences: A361997 A361998 A361999 * A362001 A362002 A362003

Keyword

cons,nonn,easy,fini,full

Author

Marco Ripà, Apr 02 2023

Status

approved