Clocks Definition and 244 Threads

First I'm not a native English speaker so sorry for grammar errors . Ok let's start my hobby is to learn things and I tried to study relativity while I where reading some example of time dilation in atomic clocks. However I remembered something the speed of a electromagnetic wave is equal to...

Now according to special relativity when in the case of two people traveling at different speeds have their own clocks running differently depending on their velocity I have understood the theoritical part of this that as c=d/t and as d= space and t= time and c= velocity of light . thus...

The minute hand of a wall clock measures 12 cm from its tip to the axis about which it rotates. The magnitude and angle of the displacement vector of the tip are to be determined for three time intervals. What are the (a) magnitude and (b) angle from a quarter after the hour to half past, the...

Consider that from the origin O of the inertial reference frame O start at the origin of time a particle that moves with speed u<c and a photon with speed c both in the positive direction of the OX axis. At each point of that axis we find a clock all the clocks being synchronized following the...

Homework Statement Hi guys, I'm in a Physics for poets class? Could you , please, help me with these questions? Suppose you are watching a spaceship go past you toward the right at close to the speed of light. 1. How do the clocks on the spaceship appear to run compared to your own clock...

Cristo's thread "Clocks go back?" prompts me to ask the question - "How many clocks are there in your home/dwelling/abode?" I count 5 clocks in our kitchen - microwave, stove, coffee maker, wall clock (battery powered with bird sounds), and over-the-counter clock radio. One in the living...

Does anyone know when the clocks go back in the United States (specifically Illinois, if that make a difference). Here in the UK, we put them back in about an hour, but it suddenly dawned on me that you lot may not do the same as us! (I presume you do put the clocks back?!)

It is often said that a clock will run slower in a stronger gravitational field. This is not always true. Give a case where a clock will run slower in a WEAKER gravitational field. Bob

Einstein’s train-carriage example: A train-carriage is moving at a constant velocity v relative to the ground. An observer is stationed on the ground perpendicular to the midpoint of the train at time x relative to the ground’s frame of reference. At this time, lightning strikes the front and...

Hello, I'm Eddie and this is my first post here. I'm almost a Junior in college going for a B.S. In chemistry but I must say that time dilation is one of the most interesting things in science. I was wondering if anyone has actual figures with regards to the difference in time between a...

Does temperature affect all clocks - do clocks become slower at higher temperatures (an oscillating inductor -capacitor circuit would slow down because of higher electrical resistance in the wires)? Is high temperature the reason why time stops at the time of the Big Bang?

something strange happened to me recently, although this is just an anecdotal story, so i appreciate that what i thought had happened may not have been the case. anyway, I've noticed that if my alarm clock is consistently set to say, 7 AM, i will wake up roughly around that time even if I've...

http://arxiv.org/abs/gr-qc/0702082 Cosmic clocks, cosmic variance and cosmic averages Authors: David L. Wiltshire Comments: 72 pages, 5 figures, typos fixed; further summary at this http URL Cosmic acceleration is explained quantitatively, purely in general relativity, as an apparent...

Homework Statement At what speed does a clock have to move in order to run at a rate which is one half that of a clock at rest? Homework Equations \Delta T = \gamma \Delta T_0 The Attempt at a Solution For clocks to run at half it's spd, \Delta T = 2 \Delta T_0...

Please Help...Synchronized Clocks I've posted this before and I just want to clear things up. If A and B are on a train moving at a constant velocity (A in the front and B in the back) and they are asked to set their clocks to 12:00 when the light from a lightbulb in the center reaches them...

Homework Statement spaceship 3 meters wide, v= 2c/3. (a.) calculate ships time, (b) sq. root factor, (c) Earth's time, (d) ships displacement, (e) lights displacement, and (f) which clock "runs slow" Homework Equations a. Ts=(3m)/c b. square root 1-v^2/c^2 c. Earth's time = answer a/b...

This is sort of a long post but I have to explain the following situation in order to ask the question so bare with me. Let's say two people, person A and person B, are on opposite ends of a train moving at a constant velocity and another observer is at rest on the platform outside (most of you...

Hello to all, Could someone give me a link that would point me towards a description of the inner workings of the famous clocks that are part of all discussions and experiments dealing with the relativity of time. What kind of clocks are those ? Thank you, VE

This is rod and shed problem (rod is moving with v towards shed) Length of rod measured when the rod is stationary = L0 Length of shed measured when the shed is stationary l0 = 0.5 L0 Two clocks are fixedd to the front and back of the shed. Explain how these clocks may be synchronised. I...

Clocks show less elapsed time in gravitational field right? So clocks on Earth seem to apply. Consider one clock stationed on the north pole and one somewhere on the equator, both at sea level. It seems there are a couple of factors in order to calculate the difference in time between...

Speed of Light c= \frac {1} {\sqrt{\varepsilon_0\mu_0}} Phase Velocity v= \frac {1} {\sqrt{\varepsilon\mu}} Electric Permittivity of Free Space \varepsilon_0 = 10^{7}/4\pi c^2 \quad \mathrm{(in~ A^2\, s^4\, kg^{-1}\, m^{-3}, \, or \, F \, m^{-1})} Magnetic Permeability of Free Space...

Quoted from http://hyperphysics.phy-astr.gsu.edu/hbase/gps.html#c1" How do they know which of the points is the correct one? (see sentence in blod) Thank you!:approve:

A direct quote from "Science News", April 22, 2006! :wink: :smile: :smile: :smile: :smile: :smile: :smile: :smile: :smile: As I first said, some forty years ago, "someday clocks will be so accurate that the academic community will recognize the fact that they are confusing two very...

Is the speed of light measurement dependent on the tick rate of different clocks? Hello I want to ask the following questions: If Clock A is undergoing only a natural gravitational time dilation, and possesses 0 rate of change in time dilation, and if it is measuring seconds at a different...

Hey all, I'm trying to build a circuit using flip flops that passes data in series using multisim. My problem is with the clock. I know that data isn't moved until a clock pluse comes along. My problem is that what exactly is the source of this (clock) pulse. Could it be a voltage source and a...

It's that time of hear folks :-p

The question is have is as follows: In 1971 four portable atomic clocks were flown around the world in jet aircraft, two east bound and two westbound, to test the times dilation predictions of relativity. a) If the westbound plane flew at an average speed of 1500 km/h relative to the surface...

I must be confused about the differences between atomic clocks and orbital clocks. Here is what I read on one site. http://www.ldolphin.org/setterfield/redshift.html The faster the velocity of light, the faster an atomic clock beats. I can undertand that. Dynamic clocks run independently, but...

I think I asked this a while back but I don't think I worded my question properly... so here it is: Imagine if you're in space traveling at a speed in which the time dilation is 1:4 (ie from Earth's frame of ref, 1 hour pass in spaceship for every 4 hours pass on earth). Suppose that we...

Why do grandfather clocks keep going? The only way I see htis working is if the chamber has no air (vacuum).

fast enough clocks to beat the "speed of light" fast clocks, how fast? the speed of light is approx 300 000 000 m/s, is there some way to translate that into an effect that can be compared to the "speed" of a clock. and if so, are there any fast enough clocks to beat the "speed of light"...

this is my second set of questions today, revising for an exam just now. would be grateful to anyone that can answer 1) The pendulum of a clock consists of a thin steel rod carrying a small heavy bob. the clock keeps correct time at 15 degrees centigrade, calculate the error in twenty four...

This is an explanation and illustration of how different reference frames assign coordinates to points in space and time, which I wrote up a while ago on a different forum. I figure it might be interesting to people here, especially in terms of showing how two different observers can both see...

With a speed of about 460m/s for the Earth's surface at the Equator as it spins around its axis. Using 2 Atomic Clocks tested to be accurate and match each other and both weighing exactly 100 lbs at an arctic lab site pretty much at the north pole. Moving one clock to Ecuador pretty much...

I asked this question in another thread, but wonder about the answer I got: Question: I bought an atomic-timed clock and wondered if while I am taking off from an airport my clock would record time slower than a clock inside the airport. Since time on the clock is actually maintained by a...

And thus, is it feasible that if the Cosmos has life in other Galaxies, could they evolve without the discovery of Time Measurement Device's, namely clocks? What if the standard measure were just Length and Distance?..could a civilisation comprehend the Cosmos without Clocks?

That "totally irrelevant" clock may mean little to you, but it and its competitors made global navigation and trade (and projection of military force) a lot safer and more viable. Historically, pragmatic, results-oriented innovations have made investment and risk-taking more attractive, and...

If particles like quarks and electrons get rest mass by interacting with electrically charged particles that fill space,we can imagine them being surrounded by a cloud of such mass-giving particles.Let's postulate that for a force carrier like a photon to exert a force on a quark,for...

So we have problems with "clocks measureing time"? Well well, the big guys are beginning to think about the problems in their definition of time [i.e., to quote Gambini et. al.: "a fundamental limit exists on how accurate a clock can be" and "Every physicist notes, upon being introduced to...

http://www.saultstar.com/webapp/sitepages/content.asp?contentID=70613&catname=Local+News Just in time, North Shore fast-clock mystery solved http://www.saultstar.com/webapp/sitepages/content.asp?contentID=70740&catname=Local+News

Hey everybody, this is my first post! :biggrin: I've always had a problem understanding why, if a space-explorer left on a ship, traveled at nearly the speed of light for a while, and then came back to earth, he might have only aged a few months whereas the people of Earth would have aged...

Suppose the time dilation formula is true: \Delta t = \frac{\Delta t^\prime}{\sqrt{1-v^2/c^2}} if v = c then the denominator is zero. If the denominator is zero and there is division by zero error then the numerator is nonzero. If the denominator is zero and there isn't division by...

I just read that the clocks on board the space shuttle go more slowly than the clocks on earth. does that mean time has speeded up for those on the shutte or slowed down ? i reckon it means time has slowed down. if they stayed up for a year by their clocks then by our clocks more than a year...

i am sure that you all know experiments have been done with atomic clocks in outer space and it was found that the atomic clocks that had been in orbit of the Earth were further ahead than the ones on earth, does this mean that you travel slightly faster through time while in orbit of the earth...