What is Axes: Definition and 181 Discussions

An axe (sometimes ax in American English; see spelling differences) is an implement that has been used for millennia to shape, split and cut wood, to harvest timber, as a weapon, and as a ceremonial or heraldic symbol. The axe has many forms and specialised uses but generally consists of an axe head with a handle, or helve.
Before the modern axe, the stone-age hand axe without a handle was used from 1.5 million years BP. Hafted axes (those with a handle) date only from 6000 BC. The earliest examples of handled axes have heads of stone with some form of wooden handle attached (hafted) in a method to suit the available materials and use. Axes made of copper, bronze, iron and steel appeared as these technologies developed.
The axe is an example of a simple machine, as it is a type of wedge, or dual inclined plane. This reduces the effort needed by the wood chopper. It splits the wood into two parts by the pressure concentration at the blade. The handle of the axe also acts as a lever allowing the user to increase the force at the cutting edge—not using the full length of the handle is known as choking the axe. For fine chopping using a side axe this sometimes is a positive effect, but for felling with a double bitted axe it reduces efficiency.
Generally, cutting axes have a shallow wedge angle, whereas splitting axes have a deeper angle. Most axes are double bevelled, i.e. symmetrical about the axis of the blade, but some specialist broadaxes have a single bevel blade, and usually an offset handle that allows them to be used for finishing work without putting the user's knuckles at risk of injury. Less common today, they were once an integral part of a joiner and carpenter's tool kit, not just a tool for use in forestry. A tool of similar origin is the billhook.
Most modern axes have steel heads and wooden handles, typically hickory in the US and ash in Europe and Asia, although plastic or fibreglass handles are also common. Modern axes are specialised by use, size and form. Hafted axes with short handles designed for use with one hand are often called hand axes but the term hand axe refers to axes without handles as well. Hatchets tend to be small hafted axes often with a hammer on the back side (the poll). As easy-to-make weapons, axes have frequently been used in combat.

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  1. Hoophy

    Possible webpage title: Understanding Multiple Axes of Rotation in Objects

    So I am having trouble with this one, I was wondering if an object could have more than one axis of rotation. More than one axis of rotation goes against what I think is possible until I thought about a coin, at which point I was stumped, if the coin was rotating in the way a coin rotates when...
  2. J

    Distribution of acceleration over axes

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  3. H

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    What does the first two equations mean? I can't make sense of the notations. Does it mean taking the x-axis to be parallel to one principal axis and the y-axis to be parallel to the other principal axis? Source: http://hepweb.ucsd.edu/ph110b/110b_notes/node29.html EDIT: I figured it out. They...
  4. J

    Axes of the Minkowski diagram

    Hello, First of all, I'm sorry since I bet there are quite a few threads about this but I still have a bit of a hard time wrapping the axes of the Minkowski diagram around my head. I understand very well that, to have the speed of light traveling at a 45 degree angle in a space-time diagram...
  5. L

    What is the Angle of a Vector with x, y, and z Axes?

    Homework Statement If a vector makes 45 degrees and 60 degrees with x-axis and y-axis respectively then the angle it makes with z-axis is equal to Homework EquationsThe Attempt at a Solution
  6. M

    Spherical vectors and rotation of axes

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  7. G

    Why Can't I Use Standard Cosine Calculations for Non-Orthogonal Axes Forces?

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  8. W

    Finding Second Moment of Inertia for Shaded Area Through Centroid?

    Homework Statement determine the second moment of inertia about the horizontal axis and vertical axis for the shaded area with respect to x and y axes through the centroid of the area . Homework EquationsThe Attempt at a Solution Since the x and y axes is drawn thru centroid , why not the y...
  9. D

    Expectation value of spin 1/2 particles along different axes

    Homework Statement Show that for a two spin 1/2 particle system, the expectation value is \langle S_{z1} S_{n2} \rangle = -\frac{\hbar^2}{4}\cos \theta when the system is prepared to be in the singlet state...
  10. kostoglotov

    Why are the eigenvectors the axes of an ellipse?

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  11. D

    Finding principal axes of electromagnetic stress tensor

    Homework Statement In a certain system of units the electromagnetic stress tensor is given by M_{ij} = E_iE_j + B_i B_j - \frac12 \delta_{ij} ( E_kE_k + B_kB_k) where E_i and B_i are components of the 1-st order tensors representing the electric and magnetic fields \bar{E} and \bar{B}...
  12. M
  13. brotherbobby

    Proving "Rotation Matrix is Orthogonal: Necessary & Sufficient

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  14. Anukriti C.

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  15. Gh778

    The position of a point in 2 rotations with 2 axes

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  16. E

    Re-scaling Functions under the Same Axes

    Consider two functions ##f\left(x, y\right)## and ##g\left(px, qy\right)##, where ##p## and ##q## are known. How can I plot the two functions on the same graph (i.e. the same axes)? The function ##f\left(x, y\right)## will have axes with values ##x## and ##y##, while the other will have axes...
  17. Robsta

    Major and minor axes of elliptically polarized light

    Homework Statement Consider an elliptically polarized beam of light propagating along the z axis for which the E field components at a fixed position z are: Ex = E0cos(ωt) and Ey = E0cos(ωt +φ) Find the major and minor axes of the ellipse in terms of E0 and φ and sketch the ellipse in the...
  18. dbaliki918

    Find the Principal Axes of the Section Shown

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  19. P

    Assigning cosine and sines for axes

    Homework Statement Hey everyone, I'm horrible at physics so bear with me if it's a really easy question. I was working a problem out, where I assigned my x-axis with cosine, and my y-axis with sine, like how I always thought it should be. However, in the solution, they assigned sine for the...
  20. H

    Relative Motion & Rotation of Axes of Reference

    I'm still very early on in my reading, so forgive me if this question isn't coherent. In the "historical introduction" section of the 1920 University of Calcutta translation of the original papers of Einstein and Minkowski available via the MIT online archive, mention is made of the fact that...
  21. S

    Uncertainty in spin on multiple axes

    In my quantum mechanical studies, I came across the information that if you know an electron's spin on one axis, then you can not know its spin on another axis. For example, if you know that an electron is spin up on the z-axis, then apparently due to the Uncertainty Principle, you can not know...
  22. C

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  23. B

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    below the speed of light we experience one axis if time and three of space. So at the speed of light the space and time unify and we get 4 isotropic axes of spacetime. 4 identical dimensions. is this correct?
  24. S

    Resolving Vector Along Non-Standard Axes

    Hi guys, I have a problem in which I have to resolve \vec{R} along two axes, a and b. However, those axes don't have a right angle between them (hence, non-standard). See the image below. http://srg.sdf.org/images/PF/VectorHW.png I believe I'm doing this correctly, however my textbook...
  25. L

    Rotation of Axes: Homework Statement & Equation Solution

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  26. L

    Rotation of Axes: 5x^3+10x^2+20x+15

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  27. B

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  28. W

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    Homework Statement AB is homogeneous with mass of 180 kg, goes 1.2m in the page and is hinged at A and resting on aa smooth bottom at B. All fluids at 20 C. Find height of water that will result on 0 force at B Homework Equations M_s = \int\int_s \ (\vec{r} \times \hat{n} )PdA...
  29. binbagsss

    Displaced Axes Theorem- quick question.

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  30. binbagsss

    Parallel Axis Theorem derived from the Displaced Axes Theorem.

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  31. binbagsss

    Moment of Inertia tensor - displaced axes theorem:

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  32. S

    Moment of inertia of a cylinder about perpendicular axes

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  33. Sudharaka

    MHB Reducing Quadratic Form to Principle Axes

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  34. F

    Inertia - Moments of Inertia of a rigid body (different axes)

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  35. O

    MHB Eliminating the xy-Term: Solving Rotating Axes Problem with θ = 30 degrees

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  36. D

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  37. N

    Measuring Spin of Electrons Along X, Y & Z Axes

    σx|x>=+|x> σx|-x>=-|-x> These equations also follows for σy and σz corresponds states |y> and |z>. if we measure along axis X then X state vector let it go which means up spin and opposite not go through which means down spin. and also same for y and z axis. But, σx|u>=|d> σx|d>=|u>...
  38. P

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  39. D

    Mapping Rotations of Relative Axes to Fixed Axes

    So I have been trying to figure out some orientation data that I gather from a triaxial gyroscope, and figure out my orientation using only initial conditions and angular velocity from the gyroscope's current axes. The data is all relative to the current orientation, so if I rotate the device...
  40. H

    The axes in Raman spectroscopy

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  41. N

    Find the Mass Moment of Inertia about the x,y,z axes

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  42. N

    Nyquist Plot Intersection with Real Axes

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  43. S

    Are grand unified theories the solution to the problem of multiple fields?

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  44. A

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    Homework Statement Shafts A and B connect the gear box to the wheel assemblies of a tractor, and shaft C connects it to the engine. Shafts A and B lie in the vertical yz plane, while shaft C is directed along the x axis. Replace the couples applied to the shafts with a single equivalent...
  45. A

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  46. M

    Parton distribution functions plot axes

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  47. B

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  48. J

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  49. S

    What is the proper form for Mohr's Circle (rotation of axes) calculation?

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  50. R

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