Time is the indefinite continued progress of existence and events that occur in apparently irreversible succession from the past through the present to the future. Time is a component quantity of various measurements used to sequence events, to compare the duration of events or the intervals between them, and to quantify rates of change of quantities in material reality or in the conscious experience. Time is often referred to as the fourth dimension, along with the three spatial dimensions.
Time has long been an important subject of study in religion, philosophy, and science, but defining it in a manner applicable to all fields without circularity has consistently eluded scholars. Nevertheless, diverse fields such as business, industry, sports, the sciences, and the performing arts all incorporate some notion of time into their respective measuring systems. Two contrasting viewpoints on time divide prominent philosophers. One view is that time is part of the fundamental structure of the universe—a dimension independent of events, in which events occur in sequence. 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 instead 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 and Immanuel Kant, holds that time is neither an event nor a thing, and thus is not itself measurable nor can it be travelled.
Time in physics is unambiguously operationally defined as "what a clock reads". Time is one of the seven fundamental physical quantities in both the International System of Units and International System of Quantities. Time is used to define other quantities—such as velocity—so 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, is highly useful in the conduct of both advanced experiments and everyday affairs of life. The operational definition leaves aside the question whether there is something called time, apart from the counting activity just mentioned, that flows and that can be measured. Investigations of a single continuum called spacetime bring questions about space into questions about time, questions that have their roots in the works of early students of natural philosophy.
Furthermore, it may be that there is a subjective component to time, but whether or not time itself is "felt", as a sensation, or is a judgment, is a matter of debate.
Temporal measurement has occupied scientists and technologists, and was a prime motivation in navigation and astronomy. Periodic events and periodic motion have long served as standards for units of time. Examples include the apparent motion of the sun across the sky, the phases of the moon, the swing of a pendulum, and the beat of a heart. Currently, the international unit of time, the second, is defined by measuring the electronic transition frequency of caesium atoms (see below). Time is also of significant social importance, having economic value ("time is money") as well as personal value, due to an awareness of the limited time in each day and in human life spans.

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  1. DD44Dostovei

    A long time coming made it back to PNW

    (Portland) to be exact. Life started out here as a infant since then its Been Lville KY, Athens OH, Charlotte NC, Tel Aviv Israel, Memphis TN, Birmingham AL, Atlanta GA So glad to be back. Hello to all and thank you for having a wonderful forum!
  2. B

    Quit wasting time on Intruder Prep - Get Bird Hunting Stuff!!!

    Yes, I am new to the Board! I love, love, love guns. There seems to be an emphasis here on self-defense stuff. I get that. We all want to be secure in our homes and protect our families. But, . . . . most of my shooting is at the shotgun range and at live birds. I encourage all of you to...
  3. Mica

    A little bragging time.

    These are not in premium condition. But they all 3 shoot good. Top down. Savage model 720 Ruger 44 carbine Browning 22 sa Didn't know I even wanted the 22. Until I started messing around with it. The only one I was really after was the 44 carbine. Boy is it fun to shoot. Only put 5 rounds...
  4. Caveman Jim

    Washington  Time to get involved or practice licking boots..

    And roll up your sleeves if you care enough about our rights in this liberal possessed state. Just received this email from Ben Carpenter from the NRA Grass Roots movement in Washington. Don't shoot the messenger. James -- Last week, the state Supreme Court made the decision to reverse the...
  5. jon321

    Form 1 filed last week what's average wait time?

    All excited about my first Form 1 suppressor purchase just curious on what the typical wait times are. Thanks
  6. ob1

    On Hold  Time stamp times on message notification

    I have noticed on a number of occasions now that message notifications from the site which are sent to my e-mail account have incorrect time stamps. Just got one that was timed about twenty minutes in advance of the current time. Time warp or should I wait twenty minutes to view the message ...
  7. mrblond

    My 1st fishing trip in a long time

    So, a friend of mine texts me about this spot he found way the bubblegum up in NE Oregon, just outside Joseph. So I meet him up in Hermiston and we drive up and camp about an hour away. we hit the lake the next day and there is one other group there. I am normally a bit of a bait snob and I was...
  8. anthonydo503

    Open Carry in Colorado (It will be my first time that I will open carry)

    I'm planning to visit Colorado and Utah around late September/early October of 2018, and I'm planning to bring my handgun when I travel. I'm not worried about carrying my handgun in state of Utah since they honor Oregon CHL. However, the state of Colorado doesn't honor Oregon CHL nor any...
  9. Rudedog

    First Time at Longer Distance

    I went out to a clear cut on Friday with a young guy who purchased a AR 15 from me a few years ago. First we practiced some carry hand guns then plinked with AR 15's a bit at 70 yards. Next we set up a paper target and shot with my CZ 455 Precision Varmint at 145 yards. Lots of wind and mirage...
  10. partsed

    The time a congressman shot the waiter

    A hungry congressman didn’t get the breakfast he ordered. So he shot the waiter. - The Washington Post A hungry congressman didn’t get the breakfast he ordered. So he shot the waiter. — The Washington Post
  11. No1camaro

    Can anyone tell me what time it is?!?!?!

    Had a lil free time the other day.... <broken link removed>
  12. trikerdon

    First time at the range with my S&W .380 EZ

    Fired over 100 rds of PMC Bronze 90gr. FMJ without a glitch. The recoil was soft. Was able to put them all in a 8" bull at about 7 - 10 yards. Didn't have the problem of shooting low to the left. However, when I tried out the Underwood 65 gr. Xtreme Defender ammo they performed on target...
  13. Joe13

    That dreaded question this time of year, "What do you want for Father's Day?".

    Well I got hit with The question last night. I know our funds are restricted (probably less then $200 to just guess) so a firearm is most likely out. I like stuff that I'll have for awhile, like a knife over Ammo but I have no idea what to ask for. Another all in one set of tools, some kind...
  14. Skier

    Assault Rifle Definition over time...

    Agreeing IP-43's use of the term "Assault Rifle" is inflammatory and not well defined (or in line with traditional definitions) I recently decided to look up assault rifle to see what Webster said, if anything... I found this a bit disturbing... Somewhere early last year (by April or May at...
  15. bsa1917hunter

    Time to share my new AR10 308 with you

    Hey guys, there's been a lot of talk about the AR10's lately. This talk peaked my interests in them a bit, so I looked for the best deal. Finally after about a two month search, a local guy posted one on gunbroker. It was very reasonable in price for what it was, so I jumped on the deal. I'd...
  16. DuneHopper

    Keep this in mind next time you see Leos & FF on the Road.

    According to a release by DHS May 3rd 2018 Suicide deaths outpace line-of-duty deaths for fire, law enforcement A sobering report released last month states that firefighters and law enforcement officers are more likely to die by suicide than from a line-of-duty death. In 2017,suicide accounted...
  17. Joe Link

    Washington  Gun-rights rally in Olympia: 'It's time to play offense'

    Gun-rights rally in Olympia: ‘It’s time to play offense’ | HeraldNet.com
  18. 9

    Current WA CPL Wait Time

    Went to the Sheriff's office in Vancouver on March 16th, was in and out in 20 minutes. They said it would be 30 days, still nothing. Anybody else experience longer than 30 day wait for CPL in Clark County? Debating whether I should call or stop in to check up on this, but wanted to give them...
  19. B

    Time for a new gun

    I was thinking that it might be time to buy a new,as in right over the counter,gun.I usually buy used guns to fill in my collection or oddballs that catch my eye.But after reading about David Hoggs antics I think It might be time to go out and buy a new gun that directly voiced my opinion to the...
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