Tides Definition and 75 Threads

Consider only the Earth-Moon system, where both the Earth and Moon are spheres. A horizontal line joins the centres of the Earth and Moon. Consider a point P that lies on the surface of the Earth. The line joining P and the centre of the Earth meets the horizontal line joining the centres of the...

It's well known that the tidal effect of the Moon on the Earth causes the Earth's rotation to slow down and the radius of the Moon's orbit to increase over time. However, the Sun also exerts a tidal effect on the Earth, which should also contribute to slowing down the Earth's spin. This raises...

Please explain high tide at antipodal side as described in Wikipedia https://en.wikipedia.org/wiki/Tide diagram. At the sublunar side of the earth, sea water is attracted by the moon causing a high tide. On the antipodal side of the Earth sea water is also attracted, somewhat less since the...

It occurs to me that it might be possible to determine a local value of G by observing the tides over a long-ish period. Tide height might be distributed as a normal curve, but it might have a measurable deviance. I wouldn't expect a left/right offset of the X coordinate based on G(local) , but...

Solar tides on the Earth are currently approximately 1/2 as strong as lunar tides. The lunar tides affect the Earths rotation as well as the moon's orbit. Therefore it seems plausible that the solar tides would affect the sun's rotation and the Earth's orbit. Can someone confirm for me that...

i have been asked to show that the TGF acting on a 1kg mass, on the surface of the Moon is equal to: TGF = 2g.e^2.(a/r^3) Where; g = 9.81 e = radius of the Earth a = radius of the Moon r = distance between the centres of the Earth and Moon.

Hello everybody! I am an Ocean Science student and in the course of my readings, I came to this forum. I am hoping that I will gain more insights and knowledge, especially in ocean physics. Thank you.

Non-Scientist here. Assume that you had a two body system (planet-moon, double-planet) where one of the bodies was very close to tidally locked. Say they are closely co-orbiting at 6 to ten diameters in a relatively quick 20 to 50 hour orbit. One of the planets is close to being tidally...

Homework Statement I know the moon does. I know it is because tidal forces fall off as 1/r3. But why? Mathematically, I mean. Homework Equations F = GMm/r2 The Attempt at a Solution None

Homework Statement Homework Equations 3. The Attempt at a Solution a) The height of the high tide is 4.5 m b) The height of the low tide is 0.25 m c) Period = 12.5 hours k= 360/12.5 = 28.8 amplitude = 2.125 m vertical shift = 2.375 m phase shift = it doesn't look like there is any...

I needed some books for preparing for IESO selection camp and i searched net and found this link: https://www.sites.google.com/site/ineso555/reading-materials The last books on the list titled as wavesandtides is the one i am looking for. Sadly, they have only given two sample pages of the...

I have been looking for an answer for so long. Everywhere I look I find answers to the question how two lunar sized moons would affect the Earth's tides and so on. But I want to know, if we had our own moon, with its normal orbit, and an additional smaller moon, (or just further away from...

I've read that tides deform the Earth's crust by about 40cm. When I try to visualize the tidal bulge approaching me and then receding away from me, it seems like the local surface under my feet would tilt slightly one way as the bulge approaches, then level out, and then tilt slightly the other...

What is TIDAL ACCELERATION or TIDAL DECELERAION? Also, could some one please explain me it's forumlae?

I was wondering if the way that light vibrates causes it to bend slightly while moving around an object with extreme mass (on top of the bend caused by relativity.) I was drawing what I thought the path of a photon should be around a massive object, but the uncertainty principal bugged me. Am...

Consider the following; We have Earth with two moons in orbit (discounting the existence of our own moon for the sake of this hypothetical scenario). One moon is the size and mass of Pluto, orbiting around 70,000km from Earth. The other is the size and mass of Pluto's moon, Charon, orbiting...

Homework Statement Homework EquationsThe Attempt at a Solution For a), I initially tried to consider the component of the gravitational force of the moon acting normally to the Earth's surface. This would be F=F_0 cos(theta) where theta is the angle between a horizontal line going through A...

Apart from the the gravitational pull of the Moon and the Sun on the Earth, does the rotation of moon contribute to the tides?

I've been looking at historical tide data for the Florida Keys at http://tidesandcurrents.noaa.gov/waterlevels.html I understand harmonic constituents. In fact, I found the following data for this location. Amplitude in Feet, Period in Days, Description 0.2 1 Principal lunar...

We know Moon creates tides on seas.Then why doesn't Moon pull loose stones or other objects lying loose on earth?

We have two tides because of the moon's attraction on the front and back side of the earth. I can understand the reason for the attraction of the moon on the front side which causes the water to move towards the moon but I can't understand the reason that the thing happens in the backside. I...

Where can I get more information on the theory of tides? http://en.wikipedia.org/wiki/Theory_of_tides I would like to see more of the derivation and explanation of the tidal forcing section in the link above. I have read the section Taylor's Classical Mechanics on Tidal Force as well...

First time poster, thanks for help I wonder if low tide is caused by centrifugal force at noon time and high tide at midnight? The centrifugal force pushes sea water toward the center of the Earth at day time, away from it at night time. So, a man weights more at day time than night time. Am...

no moon=no tides...no tides=no life... Is that entirely correct?? I was recently discussing origins of early life on our planet, the other person stated that he had read (from Prof Brian Cox I think) that: no moon=no tides...no tides=no life. Although our moon is the main influence on our...

There was a thing that kept me wondering for several years, which no science teacher managed to explain. Why does gravitational pull of the Moon causes two tides on Earth at the same time? Would'nt it be more logical for the tide to only occur directly under the moon, nowhere else, because...

Please see attatchment for qs. I really need help with number two mostly.

I was just wondering how high tides occur and happen to read the wiki article at http://en.wikipedia.org/wiki/Tide but I am bit confused like if the moon caused the tide then why there should be a high tide on the opposite side of the Earth also. The figure in the article is just confusing and I...

Ocean tides are considered to be mostly caused by the force of gravity from the Moon. Tides are presumably caused by the difference of the force applied on the "front" and on the "back"of the Earth. Meaning, gravity from the Moon cause Earth's shape to become elliptical in the plane of the moon...

I am reading George Gamow's book on gravity and in his book he says: The American physicists AA Michelson found from his experiments that every 12 hours the the surface of the Earth is deformed by one foot, as compared with a 4-5 foot deformation of the ocean's surface. This seems...

Homework Statement High tide at 4am with a depth of 6 meters. Low tide at 10 am with a depth of 2 meters. Model the problem using the equation to show the depth of the water t hours after midnight. Homework Equations y= A cos(Bx+C) +D The Attempt at a Solution: I am not getting...

I have a question about the effects of solar and lunar tides. I know that the effect of lunar tides is twice that of solar. However when I calculated the force of gravity of the Sun on the EArth vs the Moon on Earth using F=GmM/r^2 the force due to the Sun was much greater. Can anyone help me...

i mean when the moon is full like during 10-20 of lunar month the tides are higher but y?even when the moon isn't full its still there whole in sky? what is the reason?

Tides in sea are caused not by moon but by sun. Though the force of attraction caused by sun is much more than that by moon.

Hi. Some books explain tides as a result of the gravitational pull of the moon with an exaggerated drawing like A below. It seems to me that A is not correct, but B and C are more like it. Because the moon pulls all water towards it, not just one side. Which is correct and WHY?

Something that has bothered me for a long time, if tides are due to the gravitational force of attraction of the moon, and clearly the moon transverses the sky once a day then there should only be one high tide a day not two. If the second high tide is due to the attraction of the sun then I...

Hello, general relativity describes gravity not as a force (as opposed to the classical view), but as the effect of bodies following an inertial path on a distorted spacetime. How does that explain the sea tides on Earth? The moon pulls the water without pulling the surrounding land by the...

If the moon didn't exist, would the Earth still have tides? Well, yes of course. Due to the sun. But what stumps me is how often would those be... I thought every 6hrs...because that's the time the sun's max gravity effect is in the other quarter of the earth...

I've read that along with the moon, the sun also has an effect on our tides. I understand how the moon would have an effect on tides, but I don't quite get why the sun would. According to my physics book, when something is in orbit, it's really just in free fall around the thing it's...

I want to ask here if tidal forces can in a sense be considered as the opposite of the centripetal forces that drive rotations or spins. I'd appreciate any web-accessible references about this. First consider a uniform spherical cloud of non-interacting test masses falling radially toward a...

I have a question about the gravitational model used to describe tides: Is it correct to simply add the tide potentials respectively due to Earth and sun as most people do? (see for instance a good example of this approach in Eq 9 of: http://arxiv.org/PS_cache/physics/pdf/0701/0701301v1.pdf)...

Homework Statement Hello, I am a French teacher who teaches physics in English. I've proposed to my pupils this work about the tides.http://vfsilesieux.free.fr/2deeuro/Thetides.html" I would very much enjoy any kind of correction (vocabulary, grammar, ideas) to improve the quality of this...

Here is a esoteric problem that is totally unique in nature: Taylor Glacier, in the Dry Valleys of Antarctica, hosts site of a Fe2+ brine solution, expressed as a rusty discharge at the terminus. There is strong diurnal signals in seismic data gathered from an array co-located there, not...

I assume wind is also a factor but would the gravitational pull of the moon be the main force behind the oceans tides? To be honest I have no idea what even causes the wind so go easy on me if that was a dumb question.

Hi, I wonder if any of you can help, probably a very simple answer, but here goes... The gravitational pull of the sun and the moon cause the tides, correct? I also understand that energy cannot be created or destroyed, also correct? Since the orbit of both the sun and the moon are constant...

why tide force makes distance between Earth and moon longer?

Why are tides stronger at the new moon for a few months and then it changes back to having tides stronger at the full moon?

could this float generate enough electricity to be practical

Is there a median sea level that the logs of sea level data is based? I know the moon causes the tides which upsets the equilibrium on a constant basis. I need this sea level to be based upon the distance from the center of the Earth so with the elevation of a particular city on the Planet...

In class today, we calculated that the amount of gravity between the sun and the Earth is 180. This is far greater than the amount of gravity beteen the Earth and the moon. So why does the moon affect the tides rather than the sun. My take: the sun is much farther and has a broader pull...

The tidal range of spring tides is about 3.2 m and tidal range of neap tides is about 1.8m, Assume the only tidal components are m2 and s2 tides. i.e 2 tides per day due to the sun and moon. Find the amplitude of these components and also find the maximum phase angle between the m2 tides and...