Does anyone know where electronic component package standards are published?

Q. I'm looking for some sort of reference that illustrates and dimensions electronic component standards. Like SOIC, DIP, PLCC. I need to create CAD models of various components so I would like to find drawings of all of the most common EE packages. Does anyone know where to look? Thanks.

A. http://www.jedec.org

They are *the* authority.

Click on "Free Standards", then register (for free), then you can browse all the standards for everything you mentioned (and then some).

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How to make logic gates symbols in microsoft word?

Q. I'm trying to make XOR sign. Any ideas? Is there some other simple software that will allow me to do this? I don't want to install an entire CAD application, though.

A. 1. In word go to the drawing toolbar most times located at the bootom of the page.

click on Autoshapes>flowcharts

2. In paint using lines,circles and the eraser it can also work.

3. Install microsoft visio all electronic shapes, and much more stuff are built into the program. All you have to do is select it. It has lots more samples than CAD. It can be used by people in lots of different fields.

Check it out on the internet. google it or something Microsoft Visio

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Where one has to pay import duty for online purchage to toronto from the US?

Q. I would like to buy an electronic eqipment vallued aroound 300 CAD online from the US to Toronto. How I have to pay import duty

A. It depends on how the product is shipped.

If its via standard USPS (United States Postal Service), then Canada Post will charge you when you collect the parcel and tack on an additional $5 handling fee.

Some courier companies will have a customs broker pay the CRA on your behalf. They will then invoice you for a customs brokerage fee, and the duty.

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How do you calculate the area and perimeter of a circle?

Q. I forgot the formula. If anyone has the correct formulas for area and perimeter please answer.

A. The area of a circle is:
(pi)(r)^2

Circumference (the "perimeter" of a circle) is:
2(pi)(r)

http://en.wikipedia.org/wiki/Circle#Length_of_circumference

Original Question

How do i find the arc length of the following function?

Q. Polar Function
r=a*sin(theta) where a>0

Formula for finding arc length of polar function
L=int( sqrt( f(theta)^2 + f '(theta)^2), theta, alpha, beta) where alpha<=theta<=beta

Answer is a*pi

How do i solve this problem? I have no clue how to find a*pi as the answer.

A. The graph of r = asinÎ is a circle of radius a/2 centered at (0, a/2). The curve is traversed exactly once by allowing 0 ⤠Π< Ï. (Note that the arclength is the circumference 2Ï(a/2) = aÏ.)

f ² (Î) = a²sin²Πand [f '(Î)]² = a² cos²Î.

So â(r² + (dr/dÎ)²) = â[a²(sin²Π+ cos²Î)] = â(a²) = |a|. Since a > 0, the integrand is just a.

So your arclength is

Ï
â« a dÎ = aÏ.
0

This is about as nice an arclength problem as you can ever expect to see.

Original Question

How do you find the area of a circle with the middle as square shape?

Q. Ok, so you have to find the area of the shaded shape which is the circle.The circle has a radius of 4cm and the squares' (which is in the middle of the circle) length is 4x4. Please help me, It's due for Monday.

A. Use the formula Ïr^2 to find the circle.

Ï x (4)^2 = 50.27

The area of the square can be found by 4 x 4 = 16

subtract both of them to find the shaded area.

50.27 - 16 = 34.27

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The angular difference between the leading radial and the required radial should be increased as the :?

Q. The angular difference between the leading radial and the required radial should be increased as the
a- Intercepting angle increase and the A/C rate of turn decrease
b- Intercepting angle decrease and the A/C rate of turn decrease
c- Intercepting angle decrease and the A/C rate of turn increase
please explain with the answer .

A. B. Because it will now take a higher ( sharper ) angle to intercept the required radial.

Original Question

What is the length of an arc intercepted by a central angle 95degrees in a circle whose radius is 12m?

Q. What is the length of an arc intercepted by a central angle 95degrees in a circle whose radius is 12m?


Please help me, this is for my Math Exit examination review..it's been a while so I have forgotten about some of these topics :)

A. Think of the length of the arc as a fraction of a circle's circumference. A circle's circumference covers an angle of 360 degrees, so the arc will cover (angle / 360degrees) of that circumference. Circumference is defined as pi times the diameter, or pi times 2x the radius.

arclength = (95 / 360) * pi * (12*2) = 19pi / 3 meters.

Original Question

find the length of the arc intercepted by a central angle?

Q. A circle has a radius of 8 m. Find the length s of the arc intercepted by a central angle of 157 degrees.
Do not round any intermediate computations, and round your answer to the nearest tenth.

A. 2*8*pi*157/360 = 21.921 so 21.9

to check to see if it's reasonable, radius=8 so diameter = 16 so circumference = 3*16+ = 48+

half of that is 24+ if the central angle was 180.
157 is less than 180 so the arc should be less than 24.
22 seems about right.

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How do I do takeoffs in Autodesk AutoCAD Civil 3D 2008?

Q. I am needing to perform takeoffs from a DWG file. There are no elevations assigned to the contour lines, it is 2D. Here, I will need to assign elevations to the contour lines. Afterwards, I will need to perform a volume calculation to determine the earth excavation and borrow quantities.

In addition, I am also needing to determine the area of sections of pavement that are getting varying thicknesses of material. Here, I will need to determine the area of the pavement AND apply a proposed surface offset to adjust the earthwork quantities in order to take these material thicknesses into account.

It would also be nice if I could determine the length of a line, which would be helpful in finding the length of items such as curb and gutter, silt fence, etc.

Any thoughts on this?

A. To find the length of the line simply highlight the line in question and view its properties, one of which is length. Or, use the "di" command to measure distance. As for the volumes, you have to first set up a surface. This is done using terrain model explorer in land desktop, and I believe civil 3D is similar. Judging by your questions you will need to have someone help you with creating surfaces. It would be much too complicated to explain here. Hope that gets you started.

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How do you calculate cut and fill values by using cad programs.?

Q. I am using NETCAT program. and calculating the values by cross sections method but I want to learn another methods especially by autocad to control the values...
canip

A. I use AutoCAD Civil 3D and it's fairly simple. If you have two surfaces (for instance, one surface might be the existing ground surface of a particular plot of land and the other surface is a dam of a lake or something like that), you can get CAD to compute the volume of the dam. Basically CAD subtracts the existing ground surface from the dam surface and gives you the cubic yardage. It's a little more complicated to build the dam's surface, but once it's built, it's just a click of a button to get the fill value.

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how can a geodetic engineering product help me as an accountant?

Q. my course is accountancy, but we have a professor in a general education course, a geodetic engineer, who gave us an assignment. he wants us to make a write-up about how a GE product could help us in our profession directly or indirectly.. i don't know much about GE and how it can be related to accountancy so i hope you can help me.. thanks..

A. A Geodetic Engineer works on things to do with the location of points on the earth's surface, and the gravity of the earth. This involves collecting data about the points on the earth's surface to define it, and constructing charts and other engineering studies from that, so may be used in surveying, hydrology etc. This is especially associated with Civil Engineering, and Mining and surveying. Consider dams, roads, railways, buildings, property locations, mining surveys, mines. Almost everything constructed on the land needs this sort of information. And of course it is related to maps. Survey reference or datum points (trig points) are used as references for measurements to points on the map, so that it becomes possible to locate points accurately from a map.

Somewhere in all of this is GPS (satellite) navigation. As the earth is not a truly round ball, there needs to be a correction for the true shape of the earth to define a position on the earth's surface (apart from the hills and valleys), and this is a geodetic model, presumably referring the measurements to mean sea level at that location. This allows the GPS position to be located on a map using the same geodetic model, and gives us a realistic altitude. Maps are 2D representations of the 3d earth's shape, so they also rely on particular geodetic models like WGS84 used in some parts of the world, and then are converted through a projection using a co-ordinate system..

The facebook page linked below has a long description that should clear up what Geodetic Engineering means. Look down to "Don In RA ". GIS is a Graphical Information System, a database, with attributes or information associated with geographical points. Once again, a GPS navigator has something along this line when you look for the nearest filling station, motel etc.

His key fields list is here..
1. Property Surveys
2. Construction Surveys
3. Hydrographic Surveys
4. GIS
5. Project Management/Land Administration
6. Aerial/Remote Sensing/Photogrammetry
7. Mapping/Cartography
8. Land Forensic/Law
9. Land/Property Valuation

So hopefully from all this you are starting to see how it helps an accountant in daily life and the workplace. None of the things taken for granted like buildings, transport, cities, water supplies, power supplies, and so on could be done without some attempt at geodetics behind it. Think of an Egyptian setting out to build the Pyramids - even then it was still a part of it.

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Why everything is expensive in Canada compared to the US?

Q. Even though CAD is higher than USD, few exmaples:
1 gallon of Milk costs 2USD and 5 CAD
1 gallon of gasoline costs 4USD and 6 CAD
A pack of 18 Eggs costs less than 2USD and more than 3CAD

WE PAY MORE TAXES, OUR SALARIES ARE LOWER THAN US, AND EVERYTHING IS EXPENSIVE COMPARED TO US.

As for the healthcare, I prefer the american system where the employers cover their employees.

A. Also the US has 10 times the population, which makes for cheaper production due to "economies of scale".

Original Question

How to repair a Ni-Cad battery pack?

Q. I have don it before but forgot how to find the bad one. I have a battery pack that will not charge. I hooked the charger to it and found one battery that I had continunity through it without droping any voltage I think it's the one.I want to take a battery out of another bad pack and replace it. Is there any way of checking them, ( individually) with a Multimeter, or do I need to check like I did the other?

A. I would never try to repair a battery pack. Just buy a new one.

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What is the best free 3D CAD Design Software for a mechanical student?

Q. What is the best free 3D CAD Design Software for a mechanical student to be installed and learned?

A. Actually "Autodesk Inventor" and "Solidworks2008" are the most best two and the most known, and easiest to use as well.

I use Autodesk Inventor v.11, it is very effecient, easy interface, and simple to draw and produce layouts .. etc. I 've learned Autodesk Inventor in only 2 weeks, and then I did so many projects with this software. it 's really nice and simple.

Students share this program (and many other programes) on torrents, you can download the free "torrent prgram" (2Mb) from www.utorrent.com and follow the instructions and you will find everything simple.

Then download the CAD progrma using the torrent file downloaded from any of the sharing websites.

Here are the links for the torrent files that will allow you to download the prog.

Autodesk Inventor :

http://rapidshare.com/files/151414986/__Demonoid.com__-Inventor_11__autodesk__crack_5322825.0188.torrent.html


Solid works :

http://rapidshare.com/files/151415377/_-Demonoid.com-_solid_works_solidworks_2007_with_service_pack_2_2i_update_5322825.0188.torrent.html



Both programes have Tutorials and Help files, which is really simple and easy to learn from. and in short time. If you are new to torrents then you will probably need help, just messege me.

Good Luck

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A grey beetle looking bug, huge, with pinchers?

Q. I was dragging a wood pallet across the yard this morning when I noticed two of these big bulbous bugs on the pallets underside...they didn't move. They were a flat mud grey, the size of a plum, and had little pinchers. I am facinated and would like to observe them more but I don't know if they will hurt me. I didn't notice any wings. Anyone know about this bug or where I can see a photo of it online?

A. I've got a kid going into college in entymology, his first answer might be to suggest a rhinoceros beetle, going by the color and size you mention (a plum? Really? You must get small plums) and they're pretty slow and can't really hurt you - but yes, they could give you a pinch if you're foolish. But I know of a handy website that might help you out:

http://www.whatsthatbug.com/

Good luck with it!

Original Question

hey plez halp me on my project work.?

Q. i need a photo of a rhino and informations about it.plez help me and send its photo and info.

A. All the info you could possibly need!
.
http://en.wikipedia.org/wiki/Rhinoceros

http://upload.wikimedia.org/wikipedia/en/2/25/Rhino-216.jpg

http://www.rhinoresourcecenter.com/

http://www.savetherhino.org/etargetsrinm/site/1/default.aspx

Original Question

is there a software for pc where u can design cars?

Q. what the description says...

A. *Adobe Photoshop
Adobe Photoshop is the digital imaging software standard, used by photographers and graphic designers.

Alias ImageStudio
Create rendered images from 3D models, quickly and easily, at any time in the design process - from concept through to final presentation.

Alias SketchBook Pro
SketchBook Pro by Alias is a high quality paint and drawing tool application designed specifically for use with Tablet PCs and digitized tablets. It enables to quickly and easily sketch and annotate ideas and concepts.

Alias StudioTools
Industrial and automotive design suite of software that integrates the design process from concept, to engineering, to manufacturing.

Bunkspeed
Bunkspeed provides visualization software and services for design, engineering and marketing. The Los Angeles based Company develops technologies for the the digital design process. Customers include Nissan, Ford Motor Company, Jaguar, Aston Martin and Pininfarina.

HDR Light Studio
HDR Light Studio is a generator of HDR images which provide a virtual lighting set that mimics real studio techniques. It allows to produce studio photography style computer renderings of cars, new products, jewellery and packaging.

ICEM
ICEM Ltd. is the leading worldwide developer and supplier of advanced, surface-based modelling, surface quality analysis and design visualisation software for use in the design development of a wide range of manufactured products.

LightWave 3D
Newtek's LightWave 3D is an application mainly aimed at the creation of animated visual effects.

Lumiscaphe Patchwork 3D
Global solution for the creation of 3D images from 3D databases in their native format. Patchwork 3D allows to modify your product designs in real-time with realistic results, enabling easy design reviews and marketing decisions.

McNeel Rhinoceros
Rhinoceros (or Rhino) by McNeel & Associates is an advanced NURBS modeler for windows: it provides the tools to accurately model every object for rendering, animation, drafting, engineering, analysis, and manufacturing.

Opticore
Opticore provides design visualization and communication software for major manufacturing companies and design organizations. It offers real-time, interactive, photo-realistic visualization solutions.

modo by Luxology
modo is a 3D software that integrates an advanced polygonal and subdivision surface 3D modeling environment with a 3D painting system and a built-in renderer.

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How do I find the measure of the middle arc in a square?

Q. I know that the picture is not a perfect square so I just put a 7 on the sides to show you that they are the same. How do I find the measure of the arc from point A to point B?
(take the space off in between (filer. jpg)(shack. us)
img59.imageshack. us/img59/411/filer. jpg

A. add, then subtract difference

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How do i figure out the measure of a minor arc?

Q. Kathy and Tami are at point A on a circular track that has a radius of 150 feet. They run counterclockwise along the track from A to S, a distance of 247 feet. Find the measure of minor arc AS.

Which formula do i use?
the measure of minor arc AS has to be in degree.

A. Find the circumference, using the radius of 150.
Then subtract the measure of the major arc, which may or may not be the 247 feet. If it's over half of the circumference, it's the major arc. if it's less than half, its the minor arc. If 247 is the major arc, subtract it from the circumference to get the minor arc.

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How do i solve for the arcs of a circle when i only have an angle formed by two tangents?

Q. I have a circle where angle d is formed by 2 tangents and is 110 degrees. It is asking me to find the measures of the arcs and i tried using x and 360-x but i keep ending up with 220=360. What am i doing wrong.

A. A line from the point of tangency to the center of the circle forms a 90° angle with the tangent line. When two tangents intersect a line from their vertex to the center of the circle bisects the vertex angle. So now you have two triangles with angles of 90°, 55°, and 35°(which is the central angle). So the arc included between the two points of tangency is 2(35°) = 70°

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