Tip & How-To about Measuring Tools & Sensors

Measure windows - easily and precisely

I always found it difficult to accurately measure windows with a tape measure, until I put a couple of sticks together. The sticks work great for measuring window widths for window shades or for ordering replacement windows. It is also perfect for finding a minimum width, because nothing in an old house is straight.
For measurements between about 26 and 42 inches you will need two straight pieces of wood approximately 1/4 x 3/4 x 24 inches. Round off one end on both pieces.

You can use a small clamp to lightly hold the pieces together. (Optionally, if you have a router table you can put slots in the two pieces to accomodate a bolt, nut and washers.)

Adjust the two pieces so that their combined length is just a little longer than the space you want to measure, and put only light pressure on the clamp or bolt. Twist the device through the space you are measuring so that the length of the device assumes the exact width you are measuring.

Do this in a couple of places (at the top, middle and botton of the window) to find the minimum width. Then tighten up the bolt (or clamp) just a little so it doesn't slip. Then measure the combined length of your sticks with a tape measure. This is amazingly precise.

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What is the average of the numbers 37 76 92 96 81

You've got five (5) numbers to average.
First you add them together:
Then you divide that by the number of numbers you started with:
382 divided by 5 is 76.4.

Why does this work?
Imagine you had a stick 382" long and you wanted to divide it into 5 equal parts. Easy enough, you just divide the length by 5. But what if you didn't know the stick was 382" long? And what if you only had an 8' tape measure (96")?
One way is to measure off several lengths that are within the range of your tape measure and put a pencil mark at each length, then add up all the lengths.
So, if you put a pencil mark at 81" from one end of the stick, and then another pencil mark 76" from the first mark, then another pencil mark 92" from that mark, then another mark 96" from that mark, you'd find out that the last mark was only 37" from the other end of the really long stick.
So, you'd add all those measured lengths up to get the total length which is 382". But you don't want different lengths, you want equal (or average) lengths. So you divide the total length by 5.

Mar 16, 2015 | math.com Computers & Internet

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sharp microwave model R7704 replace the fuse came on start humming and went out again what could the problem be

Robert, you have a short somewhere in the electrical system and that is why it keeps blowing the fuse. Many times, I have found that one of the micro-switches connected to the door opening are the culprit to the short. You would need access to a multi-meter that can measure continuity to be able to check them. Some microwaves are more difficult than others to access those micro-switches and you will need to be able to pull the wires off of the switches to get an accurate reading. If you decide to try this yourself, either take a picture of the wiring before you remove any wires or at least write down a good description of the wiring. You might use some masking tape and put a small piece around each wire and number them in sequence and write that down so that you make sure to re-wire the switches properly. Each of the switches are going to be a normally open or normally closed switch and one of them may have a bad internal connection and you may have no reading at all or have the same reading no matter which way the button is pushed. You will have to push the button on the switch to activate the switch to get your reading. A normally open switch will have no reading until you push the button. A normally closed switch should always have a reading until you push the button. If you have no reading or a constant reading or if the button will not push, that switch is going to be your problem. Replace that switch and put everything back together and that should take care of your problem. Hope this helps!

Feb 04, 2015 | Sharp Microwave Ovens

1 Answer

how you could measure a distance of about 1 km in your neighbourhood

To measure it accurately use the longest measuring tape you can find (I have one that measures 30m). Extend it fully and starting from the beginning point lay this in the direction you wish to measure the road. At the 30m mark on the tape lay a tooth pick, or some other item with a sharp point, on the road with the point level with the 30m mark on the tape. Now without moving the toothpick hold the tape and walk in the direction you wish to measure until the beginning of the tape is level with the toothpick (check that this is accurate - best if you have somebody helping you).Now take the tooth pick and again place it on the road level with the 30m mark on the tape. Repeat this another 31 times and then on the next time measure only one metre. This will have taken you 1000 metres along the road.
Alternatively, make your self a wheel of circumference say one metre out of some suitable material (plywood). Attach an axle at the centre with a handle so that this wheel can easily revolve on the axle. Put a mark on the wheel at the circumference so that when you place the wheel on the road with this mark at your starting point on the road and then walk forward, you will be able to count the number of times it has rotated as you walk along in a straight line. When the wheel has completed 1000 rotations (with this mark touching the road) this is the 1 Kilometre distance measured.

Jan 21, 2014 | SuperTutor Homeworkhelp.Com Super Tutor...

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How to accurately measure a large part.

It depends on how accurate you need to be. You can use a caliper. If you don't have a caliper. Use a clamp then a tape measure that's not as accurate but will do the trick.

Apr 27, 2009 | Measuring Tools & Sensors

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