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1. Dictionary

   present-time

   adjective

   • 1. relating to the current period of time: "the story takes place in present-time Britain"

   Scrabble Points: 15

   • P

     3

   • R

     1

   • E

     1

   • S

     1

   • E

     1

   • N

     1

   • T

     1

   • -

   • T

     1

   • I

     1

   • M

     3

   • E

     1

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2. en.wikipedia.org › wiki › MetreMetre - Wikipedia

   en.wikipedia.org › wiki › Metre

   • Cached

   14 hours ago · The metre (or meter in US spelling; symbol: m) is the base unit of length in the International System of Units (SI). Since 2019, the metre has been defined as the length of the path travelled by light in vacuum during a time interval of 1 299 792 458 of a second, where the second is defined by a hyperfine transition frequency of caesium.

3. en.wikipedia.org › wiki › Special_relativitySpecial relativity - Wikipedia

   en.wikipedia.org › wiki › Special_relativity

   • Cached

   14 hours ago · t. e. In physics, the special theory of relativity, or special relativity for short, is a scientific theory of the relationship between space and time. In Albert Einstein 's 1905 treatment, the theory is presented as being based on just two postulates: [p 1] [1] [2] The laws of physics are invariant (identical) in all inertial frames of ...