A watch is a portable timepiece intended to be carried or worn by a person. It is designed to keep a consistent movement despite the motions caused by the person's activities. A wristwatch is designed to be worn around the wrist, attached by a watch strap or other type of bracelet, including metal bands, leather straps, or any other kind of bracelet. A pocket watch is designed for a person to carry in a pocket, often attached to a chain .
Watches were developed in the 17th century from spring-powered clocks, which appeared as early as the 14th century. During most of its history the watch was a mechanical device, driven by clockwork, powered by winding a mainspring, and keeping time with an oscillating balance wheel. These are called mechanical watches. In the 1960s the electronic quartz watch was invented, which was powered by a battery and kept time with a vibrating quartz crystal. By the 1980s the quartz watch had taken over most of the market from the mechanical watch. Historically, this is called the quartz revolution (also known as quartz crisis in Switzerland). Developments in the 2010s include smart watches, which are elaborate computer-like electronic devices designed to be worn on a wrist. They generally incorporate timekeeping functions, but these are only a small subset of the smartwatch's facilities.
In general, modern watches often display the day, date, month, and year. For mechanical watches, various extra features called "complications", such as moon-phase displays and the different types of tourbillon, are sometimes included. Most electronic quartz watches, on the other hand, include time-related features such as timers, chronographs and alarm functions. Furthermore, some modern watches (like smart watches) even incorporate calculators, GPS and Bluetooth technology or have heart-rate monitoring capabilities, and some of them use radio clock technology to regularly correct the time.
Most watches that are used mainly for timekeeping have quartz movements. However, expensive collectible watches, valued more for their elaborate craftsmanship, aesthetic appeal, and glamorous design than for simple timekeeping, often have traditional mechanical movements, despite being less accurate and more expensive than their electronic counterparts. As of 2018, the most expensive watch ever sold at auction was the Patek Philippe Henry Graves Supercomplication, the world's most complicated mechanical watch until 1989, fetching US$24 million (CHF 23,237,000) in Geneva on 11 November 2014. As of December 2019, the most expensive watch ever sold at auction (and wristwatch) was the Patek Philippe Grandmaster Chime Ref. 6300A-010, fetching US$31.19 million (CHF 31,000,000) in Geneva on 9 November 2019.
Hello guys,
I have a problem solving these two questions, anybody come up with any idea will be appreciated...
1. A jet plane circles the Earth at the equator with a speed of Mach 4. By how much time is the pilot’s watch slow when it lands?
2. A spaceship leaves Earth for a distant star. It...
I forgot to take my watch inside my clothes pocket and when I washed my clothes my watch formed some moisture and small water droplets inside, I let it dry under the sun for3-4 hours every day but still there's moisture inside, it seems won't go away. what do you recommend I should do?
Do you always need to watch out for "limitations?" How do you memorize them?
I have a question about "limitations" given within any theorem. For example: Rolle's Theorem states:
So the limitations would be: "Let f be continuous on the closed interval [a,b] and differentiable on the open...
It's one of those scary images that traumatize you... I'm actually not sure if anything will pop up because I'm too scared to even scroll through the video.
So, did you have the guts? I didn't :O
The hardcover first edition of "Trouble with Physics" came out September 2006 and sold pretty well spending substantial time at the top of the physics best sellers. The paperback edition was scheduled to go on sale 4 September 2007.
But the publisher seems to have pushed the printing schedule...
(a) What is the angular speed of the second hand of a smoothly running analog watch?
____ (rad/s)
i got 0.03 pi
webassign says "Check the syntax of your response"
i also tried 0.03, but it's wrong also..
how do i put my answer?
Does anyone watch it? I mean the UK version.
It was really good yesterday, I was surprised to see two people get fired.
Anyway I enjoyed last season's shows. I thought Syed was the best.
What is the approximate fractional difference in time measured between a quartz watch crystal resonating either normally or parallelly to Earth's surface gravitation?
My friend wants to know why I think Teslar watches are pseudo-science snake oil. There's lots of sales pitches on the web about them. Can anyone direct me to an objective review?
Hey everyone! On March 3rd, there will be a lunar eclipse! Anyone going watch or take any pictures?? If you take any pictures please post them!
For future solar/lunar eclipses go http://sunearth.gsfc.nasa.gov/eclipse/eclipse.html" !
Texas puts border patrol cameras in the public domain.
http://www.texasborderwatch.com/
An interesting idea, I'm surprised this slipped below the RADAR until now.
Big Brother is you?
If a wheel is turning at 3.0 rads/s, the time it takes to complete one revolution is about:
3.0 rads/s X 1 revolution/6.28 rads = .477 revolutions/s
now do I just times by 60s to cancel the seconds out to get 1 revolution.
The rotational speed of the minute hand of a watch is:
w=...
How do these critters reproduce, it seems like they would faint at the crucial moment and there would be a misconception.:wink:
http://video.google.com/videoplay?docid=-143292750174818734&q=funny+video&hl=en
If so, do you have any idea if the conditions and symptoms they treat on the show are at all real? IE, how accurate is the information on the show?
From past precedent, I'd expect there to be a fair amount of fluff, but not being a doctor I have no idea.
Just curious.
Anybody else watch the show Entourage? My friend introduced me to it in the winter and it's pretty much the only TV series I watch... actually its pretty much the only TV I watch period other than movies.
I just opened a couple of watch batteries that were in blister packs. They are large batteries - the size of nickels. The blister 'popped' when I opened it, certainly it was air-tight.
There was a noticeable chemical odour that emanated from it when it was opened. Did this with both...
Do you people here watch The MythBusters on Discovery Channel? I think those people on the show are super weird but cool. They have also conducted several ground-breaking experiments like "Is it possible to break wind so much that you can suffocate to death? " and "Are teeth strong enough to...
This video basically shows KDE running on top of XGL.
The file is 252MB and is encoded using XviD.
http://www.saguratus.com/nick/xgl/xgl-kde.avi
:cool: :cool: :cool:
Watch out, n00b about :) Black Holes Question.
String theory and black holes...
Hi all,
I have a question relating the linking of string (and M-theory) with that of the idea of a black hole. I understand that force can be seen to be caused by vibrations on the strings and this these can...
Does anyone watch "How it's made"
Why do i like this show? Nay, why do i LOVE THIS SHOW. I bet this show gets millions of viewers! Does anyone know how i could find out what ratings this show gets?
I'm having trouble with the correct setup for the following problem:
A physics student, who likes physics experiments, dangles her watch from a thin piece of string while the jetliner she is in takes off from JFK Airport. She notices that the string makes an angle of 25 degrees with respect...
On this site you will be introduced to the worldwide disclosure of a Secret. On February 15th you will be exposed to it if you choose to watch. If you wish to learn more, simply visit the web site. Look around and have fun.
Pace and love.
I had no interest in seeing this movie, then it won all those awards. It better have won because it is good, not because it is the first gay cowboy movie
I'm not quite understanding this, so I'll lay down some assumptions and describe how this is puzzling.
Assumptions
1. cellular phones use digital signal.
This is true of most areas. The switch was from analog to digital because digital gives much longer battery life (days compared to a...
http://www.claude-valentini.co.uk/millenniumsports.htm
Anybody know anything about watches? I have been offered this watch for 100 pounds. The watch is still in its case and it still has its 5 year warranty certificate with it. The offer seems far too good to be true so can anyone out there...
This is a question to all who are interested in the media without having a TV. Is it possible to watch TV in our laptops? and if yes what software would be needed?
A friend of mine offered to videotape talks at http://loops05.aei.mpg.de/" , so I contacted Thomas Thiemann (one of the organizers) - and he said that they're already planning to videotape the conference!
So, eventually you'll be able to see all the talks.
But there's no need to wait if...
Do you know if any where to download/watch funny cartoons for free on the net ? Pictures only are also fine..
I:d like to watch/read them at times I feel bad.
Thanks,
I would like to find some info on an actor - name and mugshot.
Ah, um.. He is a "blue movie" actor (i.e. soft core). He is on TLN (Telelatino Channel), in a movie(s) called "Latin Lover". He looks a lot like http://www.cybernation.com/images/cybernation/successcoaches/tony_robbins.jpg ...
So, who watched any of it?
I was vaguely enjoying most of the London afternoon, Sir Elton was rather entertaining, and The Who and Coldplay were pretty good too, and a surprise appearance from Richard Ashcroft, who'da thunk it? I caught a bit of Faithless in Berlin, but sadly the Germans...
Does anybody watch the show "Revelations" on NBC?
Does anybody watch the show "Revelations" on NBC? It ended last Wedensday. By the looks of it, the producers had a second season in mind. Does anyone know if they are planning another season? What do u think of the show?
if you have, let's say, a pocket watch. and somehow using and infinite energy, it travel at a light speed and still working properly. now if relatively to us, is the clock ticking.
The Russian indie film Night Watch (Nochnoy Dozor) is being compared to The Matrix.
http://www.imdb.com/title/tt0403358/
The CG looks good, as far as I can tell from the trailer:
http://www.apple.com/trailers/fox_searchlight/night_watch/
I personally think it's an entertaining show, even if a lot of people have a problem with the math part for various reasons (though I see nothing wrong with it, the amount it's used or the applications of it). And every time I see it, it makes me want to switch my major from physics to math...
this is just a question, but according to physics, if you put a magent on each side of watch (the watch is like half an inch, normal wrist watch) and applied equal gravitational force on the watch in the middle, since the net gravity is zero, would the watch speed up/ slow down in time telling...
Well, Bush economics [including his fathers] has hit pretty close to home. One of my biggest customers [historically], and a one hundred old Portland company has gone south - all the way to Mexico. Oh, the corporate owners will still make money, but five hundred highly skilled workers are...
i am taking a course "human bebings and nature" (i don't know how to translate more corectly). we watch a video tape today about polar birds. i think it is an interesting documentary film. i am amazing at how their feathers color can change differently when different seasons come, 4 seasons 4...