Shape Definition and 613 Threads

Why is Copper Tetraamine Complex a square plane? Shouldn't it be tetrahedral since there is only four bond pairs?

Hello, Is there any reason to believe an atom, say Hydrogen, is spherical via experiments, or is this merely a model for us to visualize with? Furthermore, can one prove that an atom is not a cube? Finally, is there any model in physics that can account for how a photon is emitted...

Ok this is really funny. This is a really simple question and I used to know it but the more complicated things I learn, the more doubt I have on my foundation. So what is it that causes moon to change its shape?

I once had a chat with a Prof. at school, who talked about amoeba like robots. Since I am not so much into robotics, but nevertheless found the concept very amusing, I'd like to get some feedback on what are the feasibilities of the ideas below (all of which are just random thoughts supported by...

http://www.space.com/scienceastronomy/060523_heliosphere_shape.html So if it does get will we still have contact with it

q: (set up the integral that you would use to find the volume of the solid described, evaluate the integral) The region below the plane z+y=1 and inside the cylinder x^2+y^2 equal or less than: 1,0 equal and less to z equal and less to 1 this is what i have been trying: tried -sqrt1-x^2...

From what i heard(from my brother by the way), Einstein once predicted that the universe is spherifical( i don't know if it is true or not), is the universe really spherical?? if so, then what lies outside our universe??

hi, i am secondary student, can anybody help me to find a site in proving ellipse shape of Earth orbit? and also those site which help you in understanding Principia?

Does anyone know what shape the universe is? I.e. a sphere, or an eliptical sphere? and is that the observed shape of the shape after relativity calculation?

Hi I have mentioned yesterday some integrals that have a circle in the symbol... I think the integration has to do with a square shape... What is this? Where i can find more info? Also do u know what anadelta means?

how can this be explained?

I have a difficult probelm to solve: There is a dougnut shape (toroidal coil) with N turns of wire wrapped around it. Current I flows in the wire. THe cross section of the 'doughnut' is square with height h. I am meant to use ampere's law to prove that the magnetic field at a radius r from...

Why are the planets in our solar system spread out in a plane instead of being more randomly spread around the Sun? And why is our galaxy in the shape of a plane instead of all the stars in our galaxy being more randomly spread around the middle of our galaxy? Thanks,

a) A long wire is bent into shape as shown in the figure without he wire actually tocuhing itself. The radius of the circular sectio nis R. Determine the magnitude and direction of B at the cneter C of the circular section when the cirrent i is as indicated. Well i think that due to the...

Suppose that the force of attraction between the sun and the Earth is F = GMm(\frac{1}{r^2} + \frac{\alpha}{r^3}) Where \alpha is a constant. Show that the orbit does not close on itself but can be described as a precessing ellipse. Find an expression for the rate of precession of the...

"Centrifugal" Force Say you have a cylinder of radius r with πr2h liters of water in it. If you put it on some sort of turntable and spin it with an angular velocity ω, is there a way to tell what the shape of the water will be? I mean, if you look at the cross section will you be able to...

Why are ripples on water only circular in shape? Why arent they of the shape of the object dropped in them? Like triangular or square?

This recent paper is interesting:http://arxiv.org/abs/physics/0509171 It has some interesting images, and it offers some conceptual thinks.

Here is the question, I just need verification, don't know how to make the fancy formulas here so bear with me... Consider a reflecting surface that produces parallel rays from a point source of light. The axis of the mirror lies on the x-axis which passes through the mirror at x=y=0. The...

How do you keep fit ??

Can anyone solve this... "shape of a string" puzzle? Let's say there is an infinite massless and elastic string, which laid horizontally and one of the ends is extended to infinite distance. The string is "pulled" thoroughly and somehow, so that there is a tension T along it. There is a...

For your thoughts... a theory of mine... A Method by which shape shifting strings may explain: 1. Plasma 2. Hydrogen 3. Helium 4. Neutrons 5. Gasses 6. Liquids 7. Solids Consider the following: If a string, was a string, in shape, in only one STATE of its existence, then one...

Can anyone give me more insight on this Topic... The mathematics of this geometrical shape is quite complex..,, its hard for me to imagine these shapes (infact i find it very difficult to imagine space wrap with the three spatial dimesions, its easier to imagine them with two dimesions). and...

Hello May you tell me what is the best theoretical shape around a valve guide for best flowing in an combustion engine ? best regards Philippe

Is It Possible For One To Find The Area Of A Shape In Form Of A Star,i Am Noi Good At Latex Else I Would Have Drawn It,shapes Like The Star,with More Than 5 Pointings

i want to know if there is a formula for the area of an oval shape because i have been working on it and want to know if it has been discovered

I know that shape function is a function that will give the displacements inside an element if its displacement at all the node locations of the element are known. What is linear ,polynomial in shape functions. If i say as linear somebody else may say polynomial etc. I am not able to...

Can someone point me to a website or book that explains why nuclear cooling stacks are shaped the way they are? (i.e. hyperboloid) -Burg

This is an experiment which might prove interesting. We know , thanks to the work of Oersted and Ampere , that the field around a wire carrying a current and the field around a permanent magnet are identical. Both of these fields are caused by moving charges , although the field around a wire is...

Diamond has a tetrahdral shape stucture, an allotrope of carbon with each carbon covalently bonded to 4 others. But what happens at the end Carbon of a diamond?

Here are a couple questions I could use help on, please help. 1. What force must be applied to a small cylinder piston with a diameter of 0.32 m to lift a car weighting 12,000 N that is supported by the piston in a large cylinder that has a diameter of 1.4 m? Assume that there is an...

I'm not overly familiar with GR, but I have heard that gravity is basically a result of the curvature of space. Its not an attractive force so much as its a consequence of traveling on a curved surface. But I've also read that observing cosmic microwave background hot spots leads to a flat...

Why are neurons shaped the way they are?

Cubane is a hydrocarbon with the formula, C8H8. It has a cubic shape, as its name implies, with a carbon atom at each corner of the cube. This molecule is very unstable and some researchers have been seriously injured when crystals of the compound exploded while being scooped out of a...

does anyone know why g-proteins has a shape of a helix??

Why do some books talk about universe as a torus, a saddle etc? The universe cannot be defined without physical things like matter, right? The edge of the universe is measured from one furthest matter to the other, right? The universe can take any shape. The shape of the universe is formed...

One simple question: why do liquid mirrors assume a parabolic shape when subject to uniform angular motion? (I mean, why not circular, or some other reasonably curved shape?)

Hi there. I was wondering if the universe is curved or if it is flat. By the way, one other question. When a person lifts an object the object gains Ep. Is the energy given to object by the person or does it gain energy by the Gravitational Field? even though i know that Forces...

suppose a mass m reduces its orbital velocity by 2 at some point in its circular orbit, but leaving its direction of travel unchanged at that moment, how does the orbit change? I know the new orbit is elliptical but i have no idea how to get to that conclusion.

Gauss's Law HELP! I need some help with Gauss's Law. In the book it states that if you have an irregular shape, then you can project each piece of that irregular shape onto a sphere. And since a sphere has field lines everywhere perpendicular to it, it makes life very simple because the flux...

I don't want to know the working theory for what the universe looks like, but rather what conditions need to be satisfied in order to have a viable theory of our universe. Ie, the model would need to explain how our universe could be expanding... anything like that.

how does the diff in shape of a polypeptide chain( alpha helix or beta pleated sheet) give rise to a diff in properties and functions? thanks for yr ans...

When drunk I can do 50% more weight at the same amount of reps (real numbers there, not made up). By conventional means, doing more weight will allow one to gain more muscle faster, but alcohol is not exactly conventional. One must drink large amounts of water in order for anything to happen...

Can anyone suggest a site where I can get a crash course in air flow? What I am looking for is pressure drop verses various volumes, speed, duct size, shape, etc. I have spent over an hour searching the net, but haven't had any luck. Thanks.

Let’s say I make ball (sphere) out of permanent magnet material. Where will be N/S poles, will they take fixed position or, as I think, position won't be fixed. p.s. same for magnet ring [/color]

Hi Everyone i have been having problems with my school calendar lately, and had to change one course to a grade 12 chemistry, i just attended the class for the first time friday, and it has been 2 weeks since it started. My teacher is going all out with no mercy and giving me an assignment...

Hi, I have a question CH3, doublet (one unpaired electron) has a triangular planor shape. According to vspr theory it should have a tiangular pryimidal shape. The rest of the elements in row 14 ( Si, Ge, Sn, Pb) all have a tringular pryimidal shape. From what i understand, in carbon which...

Hi, Just out of curiosity. We all know that women have different nipple heads.(Actually guys do too). What is the key determinant here? From mom? Dad? And is there a majority kind of nipple head for different kind of people? I know asian girls tend to have "petite" nipples and most...

How can the sun have much mass if it's just a bunch of gasses? And also what keeps the sun in a circlular shape? I've always wondered.

The Odd Shapes of Life ( carbon) Hi, I have a question CH3, doublet (one unpaired electron) has a triangular planor shape. According to vspr theory it should have a tiangular pryimidal shape. The rest of the elements in row 14 ( Si, Ge, Sn, Pb) all have a tringular pryimidal shape. From...