You are here: Home > Water Clock > Free Supportive Info on Water Clock Bracknell

Hate the liars and the Lies January 20, 2012 at 6:14 am

It’s used the same way as any other clock, it’s just less accurate.If you want to make a simple one, go here:http://www.pbs.org/weta/roughscience/discover/waterquality.html#clock

chris January 20, 2012 at 6:27 pm

North of the equator spins counter-clockwise and south of the equator spins clockwise.A toilet is not a very good example because the shape and design can alter the natural flow.The best test is to have a cork in the bottom of a bucket filled with water and when the cork is removed the water would naturally spin in one direction or another.Alister,So it explains why there IS a vortex and what creates it but the test was done in the US. and the quote only touches on the theory of the direction of spin.I think, since you are down there, You need to do the test yourself and tell us the truth about it.Be a Mythbuster!

Last Ent Wife (RCIA) January 21, 2012 at 6:12 am

http://www.sciencenetlinks.com/Lessons.cfm?DocID=2Click link above and have fun. Another reference that has some questions and answers posted is below.

Hande January 21, 2012 at 6:10 pm

The water clock was invented in Ancient Egypt. The water clock was used to tell time and to measure speeches in the courtroom. The inventor of the water clock was Ctesibius. He was a Greek inventor that lived in Alexandria, Egypt. Ctesibius just did not invent, it he also improved it by adding a float with a rack that turned a toothed wheel. He made the water clock make sounds like a whistling bird, bells, puppets, and other gadgets. Ctesibius lived and invented the water clock in the third century. http://www.water.eat-online.net/english/miscellaneous/waterclock.htm

Uncle68 January 22, 2012 at 6:24 am

Water clocks or clepsydra were very early forms of daily timekeepers, dating back to before 2000 BC. They used the flow of water through a small hole or pipe into or out of a vessel to track the passage of time during the day, this being indicated by the level of water remaining in or collected by the vessel. Like the other time indicator used in those early day, the sundial or gnomon, the equipment required was very simple. The water clock had the advantage that it did not need direct sunlight to operate; indeed, it was better to operate it within a large building in order to provide a relatively clean and stable environment. The clock could not work at freezing temperatures, but in those days most civilisations were situated in warm or temperate climates. Within a building, too, precautions could be taken to ensure that the ambient temperature did not fall below freezing.The water clock was much more versatile than the sundial; there is, after all, little one can do to improve an upright piece of metal, beyond optimising its shape and the decoration of the plate onto which it casts its shadow. But, as the millenia passed, many variations on the basic design of the water clock were introduced for greater reliability and accuracy. The size and complexity of the clocks also tended to increase, if only to impress the local citizenry and visitors to the city.One basic problem of the water clock is that the flow through the outlet or inlet aperture depends on the head of water above it, so that the flow rate varies with time. One simple correction for this with an outflow clock involved attendants who re-filled the vessel to the initial level when it had emptied to a lower level. The position of these graduations on the wall of the vessel could be adjusted to give a division of the day into appropriate periods, depending on its function.A simple type of inflowing clock solved this problem differently. It consisted of a small container with a hole in the base which floated on the surface of water in a larger vessel. Water flowing in gradually filled the container, until it sank. It was then recovered and emptied and the process repeated, often many times each day. As civilisations developed, the designers of these clocks became aware of the factors which determined their accuracy, including the rate of evaporation of water from the vessel, the change of flow rate through the aperture with temperature due to expansion and the change in viscosity of the water, and the need to keep the water clean and free from impurities. The simple clock gradually became more complex not only in its basic design, but with the addition of embellishments and automata designed to impress. But they lasted for a very long period of our history until the development of the pendulum clock provided greater accuracy with lower maintenance costs.

Ramona! January 22, 2012 at 6:44 pm

*what is the water clock?*how long ago did they start using it?*who started it?

BigDaddyDew January 23, 2012 at 6:28 am

Water clocks, along with sundials, are likely to be the oldest time-measuring instruments, with the only exceptions being the vertical gnomon and the day-counting tally stick.[1] Given their great antiquity, where and when they first existed are not known and may be unknowable. The bowl-shaped outflow is the simplest form of a water clock and is known to have existed in Babylon and in Egypt around the 16th century BC. Other regions of the world, including India and China, also have early evidence of water clocks, but the earliest dates are less certain. Some authors, however, write about water clocks appearing in China as early as 4000 BC.[

rajendra January 23, 2012 at 6:25 pm

http://www.ehow.com/how_6209719_make-water-clock-science-project.html

Dr. J. January 24, 2012 at 6:38 am

Last time I saw on ebay, a reproduction clepsydra sold for around $1000.It may be worthwhile to go to this page and download the pdf file there:http://portal.unesco.org/education/en/ev.php-URL_ID=26397&URL_DO=DO_TOPIC&URL_SECTION=201.htmlthe pdf file contains instructions to build a clepsydra.

hmm January 24, 2012 at 6:31 pm

there should be a magnet in the gadget room. take it, go to the ice berg, use it, take the spring to the gadget room, put it in the Machine, pull the lever, press the picture of the fire, pull the lever again, you got the spring.

loryntoo January 25, 2012 at 6:51 am

In ancient times they used the sun. Since they didn’t have clocks, there was no need to be up before daylight. Since they didn’t have electric lights and candles were difficult to make and firewood had to be gathered, they often went to bed when it got too dark to see. If they didn’t have any livestock, they were still hunters/gatherers and getting up at dawn was not critical. It was desired, though, since animals were at the water hole at dawn. The most successful hunters learned how to wake up that early (and the most successful hunters had the most wives and the most kids). They could also hear the birds waking up in the trees before the sun even rose. Once they got animals, they could rely on them to wake them up. Dogs are notorious for being up before dawn. Cows beller because they need to be milked. Roosters crow. A Native American trick for getting up before dawn was to drink a good deal of water before sleeping. Your bladder got you up.

James M January 25, 2012 at 6:09 pm

Regular Rubbing Alchol at drugstore is only 28% methyl alchol and is a really terrific disinfectant and a killer of algae. I would say your experiment should start in the neighborhood of no more than 1/4 of 1% of methyl alchol and the rest water.

liveyourlife January 26, 2012 at 6:46 am

It doesn’t always work. The ticking clock mimics the heartbeat of it’s mother and the warm water bottle, the warmth.Puppies WILL whine. It’s just something they do. Eight hours is a bit too long to expect a puppy to stay alone and not whine. The puppy will probably whine for a while, then fall asleep. It’ll take time for the puppy to adjust to being alone.

INFOPROF January 26, 2012 at 6:50 pm

I’d recommend whatis.com over Wikipedia http://science.howstuffworks.com/earth/green-technology/sustainable/home/water-powered-clock.htm

Anonymous January 27, 2012 at 6:11 am

If you’re serious, you could extend wiring from the trigger switch of a battery powered water gun such as the Tarantula. Connect it to the isolated switch output of a timer.Don