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Q: How do you find the pitch of the screw using laser?
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What is the definition of a Coherent Laser?

A Coherent Laser is a laser produced by the Coherent company in Santa Clara, California. In order to find a list of the available products by Coherent as well as the ability to contact them you can visit the official Coherent website.


Where online can I find laser thermometers?

Laser thermometers can be found at numerous places online. It depends on which type of laser thermometer that you are looking for. You have culinary thermometers and medical thermometers. Most medical sales sites will have these, as well as culinary stores.


How do you make an Archimedean screw?

The Archimedean screw can be constructed using two simple ideas. The first is a screw, which in an inclined plane wrapped around a central core or axis. The second idea is to closely confine the screw by placing it inside a cylinder the length of the screw. One variation of the Screw is to coil a flexible tube around a core shaft. As the shaft is turned, the tube will work in the same way and lift the water up, with the problems caused by an actual Screw's operation. A picture is probably worth a thousand words at this point, so drop down below and find a link to an explanation of the device. It comes complete with an aplet showing the the machine in operation. Check out how it is set up and how it works.


To find the mechanical advantage load lost in friction of screw jack?

You would have to lift a given mass (m) a certain distance(h) and work out the amount of energy(work) this has taken using W=mgh, where g is acceleration due to gravity. Then you would have to use a torque metre to wind the jack , and using the number of turns needed to lift the weight, calculate the amount of work done, using E= torque x angle travelled(in radians). In an ideal frictionless jack the two figures would be the same. The difference between the two is the amount of energy lost to friction.The mechanical advantage you mention is related to the pitch of the screw or thread.That is,a fine thread pitch can lift more weight using only human force, but with a greater number of turns.I should also mention that in a diamond shaped,lever type jack, the mechanical advantage increases, and the torque required decreases, the higher the jack is extended. It becomes a little more complicated, involving vectors, angles, and maybe even calculus. Perhaps another poster could help here.


Why uniform pressure theory is used in screw jacks?

uniform pressure theory or uniform wear theory is used to find the torque required to overcome collar friction. Which will help in analyzing and designing the screw jack.

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