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What is the speed of light in a vacuum, in kilometres per second, rounded to the nearest thousand?

Answer

300,000

300000 uint256

unit
kilometres per second (299792.458 km/s)
quantity
speed of light in vacuum (exact defined value, CODATA c = 299792458 m/s)
rounding
round to nearest 1000 km/s using standard round-half-up
sources
physics.nist.gov, codata / nist defined value: speed of light in vacuum c = 299792.458 km/s, codata 2018 / nist, exact defined value: speed of light in vacuum c = 299792.458 km/s, codata 2018 / nist: exact defined value of the speed of light in vacuum is 299,792.458 km/s, rounded to the nearest thousand km/s, codata/nist: speed of light in vacuum c = 299792.458 km/s (exact, by definition of the metre), codata/nist: speed of light in vacuum c = 299792458 m/s exactly (si defined constant) = 299792.458 km/s, en.wikipedia.org, nist codata / si brochure (bipm): speed of light in vacuum c = 299,792,458 m/s exactly, i.e. 299,792.458 km/s, nist codata / si brochure: speed of light in vacuum c = 299792458 m/s exactly (299792.458 km/s), nist codata value: speed of light in vacuum, https://physics.nist.gov/cuu/constants/value/c.html (299792458 m/s, exact), nist codata, speed of light in vacuum: https://physics.nist.gov/cuu/constants/value/c.html, nist codata, speed of light in vacuum: https://physics.nist.gov/cuu/constants/value/c.html (299792458 m/s exactly)., nist codata: https://physics.nist.gov/cuu/constants/value/c.html (speed of light in vacuum = 299792458 m/s, exact), nist codata: speed of light in vacuum c = 299792.458 km/s (exact by si definition), nist si brochure / codata: speed of light in vacuum c = 299,792,458 m/s exactly (defined constant), i.e. 299,792.458 km/s, nist, codata value: speed of light in vacuum, https://physics.nist.gov/cuu/constants/value/c.html (299792458 m/s, exact)., nist, codata value: speed of light in vacuum, https://physics.nist.gov/cuu/constants/value/c.html ; numerical value 299792458 m/s, exact., nist/bipm defined exact value: speed of light in vacuum c = 299,792.458 km/s (si 2019 definition, base unit metre defined via c); rounded to the nearest thousand km/s = 300,000, nist/bipm si brochure and codata: the speed of light in vacuum, c, is exactly 299,792,458 m/s (299,792.458 km/s), rounded to the nearest thousand km/s = 300,000 km/s, nist/bipm si definition (2019 redefinition), c = 299,792,458 m/s exactly, i.e. 299792.458 km/s, nist/codata defined si constant: speed of light in vacuum c = 299792458 m/s = 299792.458 km/s, nist/codata defined value of the speed of light in vacuum: 299792.458 km/s, nist/codata defined value: speed of light in vacuum c = 299,792,458 m/s = 299,792.458 km/s (exact, by si definition), nist/codata defined value: speed of light in vacuum c = 299792.458 km/s (exact, by definition of the metre), nist/codata: exact defined value of the speed of light in vacuum, c = 299792.458 km/s, nist/codata: speed of light in vacuum c = 299792.458 km/s (exact, by si definition of the metre), nist/si definition: speed of light in vacuum c = 299,792,458 m/s exactly (299792.458 km/s), as codified in the international system of units (si) since 1983, nist/si definition: speed of light in vacuum c = 299,792,458 m/s exactly (299792.458 km/s), as fixed by the 1983 cgpm redefinition of the metre, nist/si definition: speed of light in vacuum c = 299,792.458 km/s (exact, by definition of the metre), si definition of the metre (bipm), c = 299,792,458 m/s exactly = 299,792.458 km/s, si/codata defined value: speed of light in vacuum c = 299,792.458 km/s (exact, by definition of the metre), www.bipm.org, www.nist.gov

Work

  1. pinnedblocks 26,063,597 to 26,063,897 to · on Ethereum mainnet
  2. answered140 of 140 agreed140 needed
    #559300,000from physics.nist.gov
    #1372300,000from physics.nist.gov
    #1676300,000from physics.nist.gov
    #270300,000from physics.nist.gov
    #367300,000from physics.nist.gov
    135 more
  3. signed
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    typed data
    the exact bytes a consumer verifies, as JSON
    attester
    0x5598aa9146215bc13eb26f2c692ad1461fd32982
    signature
    0x634b1654cd3153723be949b48d5ed9735ae82535b205698e2ea19176448b786a4d2d825481b4c44cebdce802d9439249999a4c52505c93cd69a6d8902b4995751b
    question hash
    0x705702286a2800d67db5073316d45d4955866babbd450b6388ebdb5356c3f621
    answer type
    uint256
    consumer
    none named; signed for the zero address
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