
- Mastros commented on jprussack's instructable How to Dry a Cell Phone
- Mastros commented on gravityisweak's instructable Coat Hanger Drill BitView Instructable »
Very nice idea!! Excellent tool in just the right price!!It should be possible to stabilize a long piece of wire in the following way:-- sandwich a part of the length, say 5 or 10 centimetres (2 or 4 inches) within two pieces of wood.-- then sandwich the next part of length in another two pieces of wood, this time placing them vertical to the previous two.-- continue like this untill you cover the whole length of the wire.When you look at the wire from its axis, the pairs of wood should look like a cross.You will also have to construct some support to keep the pairs of wood in place.Each pair will prevent the wire from wobbling in one direction. The pair after it will prevent it from wobbling in a direction verical to the previous one. In all, the wire should turn straight without any wob…
see more » - Mastros commented on jberry15's instructable How To Make A Bug out BagView Instructable »
Me thinks..."Unfriendlies"?!! "Be prepared"?!! For what? in case of an invasion? Well, which country do you live? Invasions dont happen suddenly, like rainstorms happen in some countries. A proposal: If you are worrying for a foreign invasion, the correct thing to do is to tell other people, discuss it with them and... But you can't worry for an invasion without a specific reason. It is silly, and naive. It is more telling for you rather than the political conditions.A proposal: If you are worrying for an invasion, act politically, tell other people and suggest that the country should prepare. **The country should prepare**, with all the many, or few, resources available to the state. Not one person completely separated from the others and in a selfish way. Again, this…
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For your calculations and almost all of your conversions into various units, you may want to try this calculator:https://www.eeweb.com/tools/calculatorIf I remember correctly, you need to register first for the calculator to appear, but it is free.It is a very rich and very well designed calculator. You just start typing a measure, say a length, and the calculator starts showing the conversion in many other units.There are many constants, and some formulas available.-- ==) * (== --For the specific case mentioned in the instructable:To find the speed, we need to calculate the distance covered by 38 revolutions in 16 seconds. So:speed = 2*pi * 4 feet * 38 / (16 seconds) = 59,6902 feet/secondWe clock on the tab at the right of the calculator, which reveals the conversion plate. Then we clic…
see more »For your calculations and almost all of your conversions into various units, you may want to try this calculator:https://www.eeweb.com/tools/calculatorIf I remember correctly, you need to register first for the calculator to appear, but it is free.It is a very rich and very well designed calculator. You just start typing a measure, say a length, and the calculator starts showing the conversion in many other units.There are many constants, and some formulas available.-- ==) * (== --For the specific case mentioned in the instructable:To find the speed, we need to calculate the distance covered by 38 revolutions in 16 seconds. So:speed = 2*pi * 4 feet * 38 / (16 seconds) = 59,6902 feet/secondWe clock on the tab at the right of the calculator, which reveals the conversion plate. Then we click on the button "speed", from the buttons at the lower part. We write or transfer this number 59,6902 to the appropriate box for "feet/second", and the calculator automatically converts it to many other units. In particular:speed = 40,6979 miles / hour** ** ** **In the international system, the separator for decimal digits is a comma, "," , not a dot.
Turning the telephone at the end of a string creates a current of wind, like a fan blowing cool air in summer. So, the relevant aspect is speed, not acceleration.