Shape Definition and 638 Threads

A shape or figure is the form of an object or its external boundary, outline, or external surface, as opposed to other properties such as color, texture, or material type.
A plane shape, two-dimensional shape, or 2D shape (plane figure, two-dimensional figure, or 2D figure) is constrained to lie on a plane, in contrast to solid figures.

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  1. A

    What is the formula for finding the area of a non-symmetric oval shape?

    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
  2. C

    What are shape functions and how are they used in FEA?

    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...
  3. 6

    Understanding the Design of Nuclear Cooling Stacks

    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
  4. M

    Shape of electromagnetic field around a straight wire carrying a current.

    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...
  5. B

    Diamond has a tetrahdral shape stucture

    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?
  6. R

    Which phase of matter has a fixed volume and takes the shape of its container?

    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...
  7. M

    Shape of the Universe: Flat or Curved?

    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...
  8. J

    The Unique Shape of Neurons: Exploring Their Form & Function

    Why are neurons shaped the way they are?
  9. R

    What should be the shape around each carbon atom?

    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...
  10. N

    Why g-proteins has a shape of a helix?

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

    Shape of the Universe: Interaction of Forces & Evolution

    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...
  12. F

    Why Do Spinning Liquid Mirrors Assume a Parabolic Shape?

    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?)
  13. bayan

    Exploring the Shape of the Universe and Its Impact on Energy

    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...
  14. G

    How does velocity affects the shape of orbit

    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.
  15. Cyrus

    Gauss's Law and an irregular shape

    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...
  16. G

    Shape of the Universe: Conditions for Viable Theory

    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.
  17. E

    Exploring the Impact of Polypeptide Chain Conformation on Biological Functions

    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...
  18. ShawnD

    Can alcohol actually improve your workout performance and muscle gains?

    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...
  19. B

    Air Flow Crash Course: Pressure Drop V. Vol, Speed, Duct Size & Shape

    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.
  20. eagleone

    Permanent Magnet Shape: Position of N/S Poles

    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
  21. D

    Draw and name the shape of the following molecules: a) CO3^-2 b) SF2

    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...
  22. B

    The Odd Shape 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 what i understand, in carbon which...
  23. P

    What Factors Determine Nipple Head Shape?

    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...
  24. G

    Exploring the Mass & Shape of the Sun

    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.
  25. B

    Why do some elements in column 14 have different shapes than carbon?

    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...
  26. T

    Universal Shape: Is There One in Our Universe?

    Is there such a thing in our Universe as a "Universal Shape"? By that, I mean, is there one shape that everything else in the universe is made up of? I suspect that a "circle" would be more fitting if there as such a universal shape. If everything in the Universe is made up of Atoms...
  27. C

    Centroid of a shape with a half circle hole

    I'm not sure if this is physics, but I thought I'd ask my question in case someone knows. In my effort to find the centroid of a cross section, I have a half-circle hole at the top of the shape. I know that the area is (r^2*pi)/2 and from the edge of cross-section to the center of the...
  28. Greg Bernhardt

    Arrange the numbers 1 through 10 in the shape of a pyramid

    Arrange the numbers 1 through 10 in the shape of a pyramid (1 number at the peak, 2 numbers in the next row down, 3 in the next row, and 4 in the bottom row). The numbers must be arranged such that each number is equal to the difference of the two numbers directly below it. For example, if 5 and...
  29. P

    Does the univeres have size or shape?

    I have heared people say that the universe has no size or shape. My problem with this is how can the universe be expanding or how did it come from an infinitaly small spot(Big Bang). If it is expanding because an infinitly large object can not expand from an infinitly small point. I think...
  30. Adrian Baker

    Is the Universe's Shape Just a Matter of Perception?

    What shape is the universe presently believed to be? and Is it possible to visualise the shape? Any thoughts or good links would be very welcome.
  31. H

    Physics- falling objects, parabola shape

    Hey! I know that the horizonal and horizontal motion are unrelated, and the velocity remains the same (if there is no air resistance, friction etc)- this correlates with the whole 'shooting a gun and dropping a bullet at the same time, which one will hit the ground first? They will fall at...
  32. H

    Physics- falling objects, parabola shape

    Hey! I know that the horizonal and horizontal motion are unrelated, and the velocity remains the same (if there is no air resistance, friction etc)- this correlates with the whole 'shooting a gun and dropping a bullet at the same time, which one will hit the ground first? They will fall at the...
  33. T

    What Is the State and Shape of an Electron?

    I just wanted to ask what is the state(solid,liquid,gas) and shape of electron? I know this is a weird question. But, electron has to be something? Please tell!
  34. S

    Size matters but so does shape.

    Quantum confinement. Size matters, but so does shape, at least in the world of semiconducting nanocrystals, report chemists at Washington University in St. Louis. Their findings, published in the August 2003 issue of Nature Materials, demonstrate experimentally that the shape of a...
  35. Z

    Unlimited Universe: Debunking Theories of a Warped Universe

    The universe is infinite in size. All the theories about a warped universe are wrong. From where you are standing, hold a yard stick and pick any direction including up/down and imagine traveling out into the universe along a STRAIGHT line parallel to the yard stick. Let's say (just for fun)...
  36. Z

    What is the Most Efficient Blade Design for an Air Driven Turbine?

    What is the most efficient shape of an air driven turbine? I want to achieve the greatest possible torque with the lowest volume of air. I hope I am posting this in the correct place. If not, any links would be helpful. Thank you very much.
  37. J

    Understanding the Properties of EM Waves: Polarization, Coherence, and More

    There are many properties of EM Waves that can be seen as some kind of ordered distribution of energy in space and time. I can think of a few: - Polarization: Direction of the electric field in space. - Coherence: Some kind of phase relationship My questions are: - How does a single...
  38. E

    Exploring the Shape of the Universe: Spherical or Cylindrical?

    What is the shape of the universe? Judging by general relativity, the shape of the universe could be roughly spherical, and also roughly cylindrical. Another interesting thing is that the universe actually could be static and un-expanding or contracting. Imagine the universe like the earth...
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