Waktu itu apa sih? Jelaskan dalam bahasa sunda ya

Waktu (basa Hormat: Waktos) nyaéta bagian tina sistem ukuran pikeun ngabandingkeun lila lumangsungna kajadian-kajadian sarta selang antara kajadian-kajadian dimaksud. Dina hal ieu, skala waktu mangrupa interval antara dua kaayaan/kajadian, atawa bisa mangrupa lila lumangsungna hiji kajadian. Skala waktu diukur ku hijian detik, menit, jam, poé (Senén, Salasa, Rebo, Kemis, Jumaah, Saptu, Ahad), bulan (Januari, Pébruari, Maret, April, Méi, Juni, Juli, Agustus, Séptémber, Oktober, Nopémber, Désémber), taun, windu, dékadeu (dasawarsa), abad, milénium (alaf) sarta saterusna.

Pikeun ngukur skala waktu anu lumangsung pohara gancang (dina jero dunya éléktronika sarta semikonduktor), lolobana jelema ngagunakeun hijian mili detik (sapersarébu detik), mikro detik (sapér hiji juta detik), nano detik (nanosecond), piko detik (picosecond), jeung saterusna.

Dina dunya fisika, diménsi waktu jeung diménsi ruang (panjang, lébar, sarta volume) mangrupa diménsi ukuran anu dasar, sajaba ti beurat jeung massa. Gabungan ti waktu, ruang sarta beurat kiwari bisa dipaké pikeun nyaritakeun sarta ngécéskeun rusiah alam sacara kuantitatif (dumasar kana hasil ukur). Contona tanaga (énergi) dinyatakeun dina hijian ukuran kg*(méter/detik)kwadrat atawa anu mindeng dipikawanoh nyaéta hijian watt*detik atawa joule.

In physics and other sciences, time is considered one of the few fundamental quantities. Time is used to define other quantities – such as velocity – and defining time in terms of such quantities would result in circularity of definition. An operational definition of time, wherein one says that observing a certain number of repetitions of one or another standard cyclical event (such as the passage of a free-swinging pendulum) constitutes one standard unit such as the second, has a high utility value in the conduct of both advanced experiments and everyday affairs of life. The operational definition léaves aside the question whether there is something called time, apart from the counting activity just mentioned, that flows and that can be méasured. Investigations of a single continuum called space-time brings the nature of time into association with related questions into the nature of space, questions that have their roots in the works of éarly students of natural philosophy.

Among prominent philosophers, there are two distinct viewpoints on time.

One view is that time is part of the fundamental structure of the universe, a dimension in which events occur in sequence. Time travel, in this view, becomes a possibility as other "times" persist like frames of a film strip, spréad out across the time line. Sir Isaac Newton subscribed to this realist view, and hence it is sometimes referred to as Newtonian time. The opposing view is that time does not refer to any kind of "container" that events and objects "move through", nor to any entity that "flows", but that it is instéad part of a fundamental intellectual structure (together with space and number) within which humans sequence and compare events. This second view, in the tradition of Gottfried Leibniz