how do you find out the helix angle of a helical screw?
466224
Seems to me that you would measure the length of the screw and then count the number of threads.Then measure the mean diameter (average of ID and OD).Then imagine that you unwrap the screw so that you see a wedge shape on paper.Then the angle of the helix is given by the angle made by that sloping side to the base.
695430
There's not enough information to answer the question. We need to know at least one angle as well as the length of two sides.
436134
The UNF is Unified inch screw thread, fine-pitch series.\n\nThe UNJF is Unified inch screw thread, fine-pitch series, with rounded root of radius 0.15011P to 0.18042P.\n\nHope this helps.
926295
Convert all this to MKS units and find the cross-section of that wire.\n\nE (stainless-steel) is given to be 18 x 10^10 N/m^2.\nCross-section is from pi(r^2).  This must be in m^2, not mm^2.\n3.14159(0.125*10^-3 m)^2 = 4.909 x 10^-8 m^2 cross-section.\n\nYoung's modulus (E) is given as,\n\nE = (delta F / cross-section) / (delta length / original length)\n\nDelta F is the tension in the wire, thats the first part of solving this problem.  So rearrange the equation for delta F, renaming delta F as "tension" and substitute the value given in place of E:\n\nTension = (18 x 10^10 N/m^2) * (8 x 10^-5 m / 0.028 m) * (4.909 x 10^-8 m^2)\n\nTension in the wire is therefore 25 N.\n\nThe magnitude of force on the tooth is 25 sin 30 deg or 12.5 N\n\nWarning!:  While the reasoning is sound, double-check all of my math.  Also, note that I rounded the intermediate answer 25 N.
544028
You have to have a right triangle.\nThen you figure out which is side is opposite or adjacent from the angle you need.
98672
use the tangent ratio ( trig function ) or inverse tangent of (6/ (43/8)) OR iNV TANGENT (1.116) = 48.14 degrees and to get the other angle, just subtract it from 90 degrees or 41.86 degrees. hope it helps how I got it. go over the trig function or cohsahtoa rule
1989
I assume you are talking about vector analysis.  The graphical method would be drawing the vectors head to tail and to scale. and then drawing in the resultant and using your ruler and protractor to measure the displacement and angle.
431862
There are two angles formed wherever two sides of the hexagon meet. The angle inside the hexagon is 120 degrees and the angle outside the hexagon is 360 - 120 = 240 degrees. You can see this easily by placing a point at the center of the hexagon and connecting it to the 6 points where the edges of the hexagon meet. This forms 6 equilateral triangles and every one of the angles of the 6 triangles is 60 degrees (180/3). You can see that the angle inside the hexagon where 2 sides of the hexagon meet is equal to 2 of these 60 degree angles; hence 120 degrees. Draw it and you'll see it right away.
777663
2t, where t = arctan(Electrostatic force/Weight);\nThe electrostatic force will act horizontal, and the weight vertical, and these two must compose to a force along the suspending thread.\n\nSubstitute the numerical values in and find the angle.
463511
Use the double angle identities.
827798
You haven't told us what point it's pivoting about.\nThis is a Physical Pendulum problem:\n\nT = 2π√(I/mgL)......for small angular oscillations....\n\nI = mR²  where R is the mean radius of the hoop\nL = the distance from the pivot to the center of mass of the hoop\n\nGOTTA have L............
296949
DOUBLE-STRANDED HELIX
923039
email me, calcu_lust@yahoo.com, i'll write out a nice solution.\n\nEdit: Go to my website, and aforementioned nice solution is typed out as a .pdf for you to download, with all the correct symbols and such:\nhttp://geocities.com/calcu_lust/yahooans.pdf
352939
it should have a right angle.\n\nThus, it's a right triangle
733210
You basically have 2 options. Use a protractor and measure them (The internal angles total 180 degrees).\n\nThe other option is using the trig functions (Sin, cos and tan), however you must have some info on the triangle eg. length of sides to apply any of these.
799966
the external angle\n\ni hope that this helps
494152
From the point where your 52 degree angle is going to be, measure 1-9/16" over and 2" up.  The angle nearest your 1-9/16 measurement will be pretty close to 52 degrees (actually about 52.00126756, but in making jigs and other shop fixtures, I think 1-9/16" over and 2" up are pretty close).