?????/ sruthi? KR IRS On Fri, 8 Oct 2021 at 05:23, 'gopala krishnan' via Thatha_Patty < [email protected]> wrote:
> *THULABHARAM 4* > > *Continued from part 3* > > *Re- posted after editing and updating information.* > > *Gopalakrishnan dated 8-10-21* > > 21. Milligram scale > > Milligram scales are typical used for drug dealing, industrial, > research, chemical, pharmaceutical, electronics, precious metals, > jewellery, and educational applications. > > 22. Analytical balance > > *An analytical balance is used to measure mass to a very high degree of > precision and accuracy. The* measuring pan(s) of a high precision (0.1 mg > or better) analytical balance are inside a transparent enclosure with doors > so that dust does not collect and so any air currents in the room do not > affect the balance's operation. > > Analytical precision is achieved by maintaining a constant load on the > balance beam, by subtracting mass on the same side of the beam to which the > sample is added. > > 23. Spring scale > > In a typical spring scale, the spring stretches in proportion to how > hard the Earth pulls down on the object. It is therefore affected by the > local gravity. *By Hooke's law, every spring has a proportionality > constant that relates how hard it is pulled to how far it stretches.* > > Some weighing scales such as a Jolly balance (named after Philipp von > Jolly who invented the balance about 1874) use a spring with a known spring > constant (see Hooke's law) and measure the displacement of the spring by > any variety of mechanisms to produce an estimate of the gravitational force > applied by the object, which can be simply hung from the spring or set on a > pivot and bearing platform. > > RACK AND PINION MECHANISMS are often used to convert the linear spring > motion to a dial reading. > > Spring scales measure weight, or more precisely, the tension force of > constraint acting on an object, opposing the force of gravity. > > The hooks law in summary states, the spring constant is depend on the > quality of spring material. Hence IF OVER WEIGHT IS WEIGHED, SPRING MAY > EXPAND MORE AND WILL NOT CONTRACT and scale may not show 0 point . I will > continue in next posting > > 24. Hydraulic or pneumatic scale > > It is also common in high-capacity applications such as crane scales to > use hydraulic force to sense weight. The test force is applied to a piston > or diaphragm and transmitted through hydraulic lines to a dial indicator > based on a Bourdon tube or electronic sensor. > > 25. Electronics scale > > Traditional mechanical balance-beam scales intrinsically measured mass. > But ordinary electronic scales intrinsically measure the gravitational > force between the sample and the earth, i.e. the weight of the sample, > which varies with location. So such a scale has to be re-calibrated after > installation, for that specific location, in order to obtain an accurate > indication of mass. > > 26. Supermarket/retail scale > > These scales are used in the bakery, delicatessen, seafood, meat, > produce, and other perishable departments. Supermarket scales can print > labels and receipts (in bakery specially), marks weight/count, unit price, > total price and in some cases tare, a supermarket label prints > weight/count, unit price and total price. > > Some modern supermarket scales print an RFID tag that can be used to > track the item for tampering or returns. In most cases these types of > scales have a sealed calibration so that the reading on the display is > correct and cannot be tampered with > > 27. Bath room scale mechanical > > Here the pressure on a helical spring is extended on a needle and it > reads over a dial. Sometimes the dial could be made to move on a base than > the needle. > > 28. Some of the sources of error in high-precision balances or scales > are: > > Buoyancy, because the object being weighed displaces a certain amount of > air, which must be accounted for. > > Some high-precision balances may be operated in a vacuum. > > Error in mass of reference weight > > Air gusts, even small ones, which push the scale up or down > > Friction in the moving components that cause the scale to reach > equilibrium at a different configuration than a frictionless equilibrium > should occur. > > Settling airborne dust contributing to the weight > > Mis-calibration over time, due to drift in the circuit's accuracy, or > temperature change > > 29. Symbolism of scale > > *The scales (specifically, a two pans, beam balance) are one of the > traditional symbols of justice, as wielded by statues of Lady Justice. This* > corresponds to the use in metaphor of matters being "held in the balance". > It has its origins in ancient Egypt. > > *A doubt arose with me about balance in courts behind judge. If in the > lower court judgement is given as per scale, why there are upper courts?* > > *I came to the conclusion we are humans with two qualities- doubt and > dissatisfaction. Hence the upper courts.* > > Now whether used in Tulabharam or not the *hanging scale in the temple > slightly to one side gives the God giving intimation- I will grant what is > justified with a small addition. You may pray for* anything. I will never > say no. But do not expect all that you want will be given. Justified will > be given by me with a mun thookkam (slightly more) > > 30 Manakkanakku > > I do not know what software in brain make it work, a normal person can > tell the weight of an item with 80 % accuracy when it is between 500 grams > to 2 kg. Probably information of such weights being frequently handled a > scale would have been formed in the brain. > > It is not only for weight, but for volume, length or breadth also. Many > could just see the size of a room and tell the area. Not looking in to tile > size etc. > > 31 Missing balance story > > I will complete this posting with the laughing incident of a merchant. > > The merchant was ready to go over to the market in the morning with the > items and balance arranged in the previous night itself keeping it over the > basket. > > The wife desired to purchase a few items from the market. Merchant said, > he would get them provided there was good value for the products. > > Our lady does not relish it. She could not relate between good value and > meeting her requirement. > > She simply took and hide his scale (Thras) after he went to sleep just > below his basket which could not be seen by him. > > Morning merchant found thras missing and awakened his wife after a > though search. She pretended as in deep sleep. > > Time was passing. Finally he felt something fishy. He used is tactic. I > was thinking costlier items for you after sale in coming market days also. > > > Wife hearing it got up. She started searching here and there as if she did > not hide. Finally took it from BELOW HIS BASKET ITSELF where it was hidden, > which she was sure, he might not search. > > End of the story- She got better items than what she demanded on that > day itself though sale was not so profitable. > > > > -- > You received this message because you are subscribed to the Google Groups > "Thatha_Patty" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/thatha_patty/1676555328.326432.1633650821784%40mail.yahoo.com > <https://groups.google.com/d/msgid/thatha_patty/1676555328.326432.1633650821784%40mail.yahoo.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Thatha_Patty" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. 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