Hello, what is the principle of gold sling?

Hanging water is to calculate the content of **volume and then calculate **, which can also be said to be the volume of hanging**. **Equipment required for hanging water: an electronic scale (also a balance tool can be used), disposable paper cups or open cups, measuring cups, fine fishing line or fine cotton line, and a calculator.

Note: The electronic scale must be accurate to two decimal places (for weighing 200 grams or more than 500 grams; The cup and electronic scale depend on the size and weight of the water to be lifted. More than 100 grams ** It is best to use more than 500 grams of electronic scales and large-mouth plastic cups.

Once the lifting tool is ready, it will be color-checked.

The process of lifting water is as follows:

First of all, weigh the ** weight of the water that needs to be lifted (if it is sand gold, it needs to be smelted first);

Secondly, the cup is full of water to cover the 3 2 of **;

The third step is to hang the ** with a thread, and you can only use a circle to tie it up to hang the **, ** do not get wet and other sundries;

The fourth step is to put the cup of water on the electronic scale to zero;

The fifth step is to slowly put the hoisted ** into the water cup, stay for about 15 seconds to get the accurate number displayed on the electronic scale, remember not to touch the low cup wall;

The sixth step calculates, the weight is divided by the number obtained by the hanging water, that is, the content of the water (the density is: just like that, for the water hanging method, the general standard is to adjust the water temperature at 25. It is calculated as follows:

Lifting Hydraulic Weight = Content. If 100 grams is: Lifting water = content.

Hello, at present, the principle of this ** hanging water is that as long as there is one end of the water does not fall, then the other end will not be installed on the ground, and the two ends are balanced by the principle of hanging water.

The density is measured by the hanging water method, which is to measure the buoyancy of ** or other jewelry in the water, and then find the volume of ** or other jewelry through the formula of buoyancy, and then according to Archimedes' principle, the density is equal to the weight divided by the volume.

There is a formula: Fineness = Weight in air Weight in water

It is the density of **, which is the general data in chemistry.

Transform the conventional formula, weight (volume times x density) purity, then why the weight of hanging water is equal to volume, because 1 gram of water is just equal to 1 ml, the process of lifting water only increases the volume of water, which is also the volume of **, so there is weight, and finally, divide the actual weight by the weight of the theoretical 100% purity, and the actual purity is obtained.

The disadvantage of the water hanging method is that if the density is doped with tungsten or iridium and other substances that are very close to **, the traditional water hanging density method cannot be detected. The only way to do this is to drill the gold bars to break them or melt them completely.

When some merchants **** jewelry or gold bars, if they want to preliminarily detect whether the jewelry is pure gold without damaging the jewelry, they will use the hanging water method. The formula for detecting the fineness of the method is: the weight of the jewelry in the air and the weight of the jewelry in the water The fineness.

The tools used in the water hanging method are very simple, an electronic scale accurate to two decimal places, a beaker, or an ordinary cup, a thin line. After weighing the jewelry in two parts, you can confirm whether the jewelry is pure gold by calculating it with a formula. One thing to note is that this method works for solid jewelry, not if the jewelry is hollow.

Identification methods

1. Look at the color and color: Many people know that according to the color of the **, it can be divided into pure gold, K gold, real gold, fake gold, etc. Generally, pure yellow with a fineness of more than 95% can be called pure gold, a positive yellow fineness of about 80% is called real gold, a yellow fineness of about 70% is called K gold, and a yellow with a slight gray fineness of about 50% can be called fake gold.

2. Look at the weight: ** It is about twice as heavy as silver, lead and tin of the same volume. Real gold has a falling feel when held in the hand, while copper or other only has a heavy feeling and no falling feeling.

3. Listen to the sound: Generally, the real ** will make a dull low sound of "poof, poof" when throwing it up, with sound without rhyme and without elasticity, K gold has rhyme, sound, elasticity, the greater the elasticity, the sharper the rhyme, the older the color. The sound of the fake ** is generally a "dangdang" sound, and the sound has an aftersound, and it beats violently after landing.

Summary. Hello Dear, the following answer has been found for you. The error of the calculation results is different, and the data that needs to be measured is different.

The first method: hanging water method The formula for detecting **color is: **weight in air **weight in water**color.

Purity is determined by taking advantage of the important difference between water and air. The second method: Density = Mass volume.

This method is to determine the purity of ** by calculating the density of **. Both methods are commonly used. But the difference is that method 1 only needs to calculate two sets of weight data, while method 2 needs to calculate the volume and mass to calculate the density, and compare the purity of **.

The error of the latter method is relatively large, so the actual life will generally use hanging water to measure the purity of **.

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Hello Dear, the following answer has been found for you. The error of the calculation results is different, and the data that needs to be measured is different. First method:

The formula for detecting the color of the method is: weight in air weight in water color. Purity deficits are determined by taking advantage of the important difference between water and air.

The second method of early planting: **density = **mass **volume. This method is to determine the purity of ** by calculating the density of **.

Both methods are commonly used. But the difference is that method 1 only needs to calculate two sets of weight data, while method 2 needs to calculate the volume and mass to calculate the density of the empty bird, and compare the purity of **. The error of the latter method is relatively large, so the actual life will generally use hanging water to measure the purity of **.

No.

Generally, the weight of the water must be within 200 grams, so that the color of the lifting is accurate. When hanging water, prepare a bottle of distilled water, the amount of water is not important, but the water temperature must be 25 degrees Celsius, otherwise there will be errors in color.

The formula for hanging color is:

Gold weight, floating weight, density = fineness.

Generally, the density is at 25 degrees Celsius.

The method of hanging water is to calculate the volume of the water and then calculate the content of the water, which we understand as the volume of the hanging.

Equipment required for hanging water: an electronic scale, a disposable cup or an open cup, a fine fishing line or a thin cotton line, and a calculator.

Note: The electronic scale should be accurate to two decimal places (for weighing 200 grams or more than 500 grams; The cup and electronic scale depend on the size and weight of the water to be lifted.

Once the tool is ready, the hanging water will be used for color.

1) Weigh the weight of the water that needs to be lifted.

b) The cup is full of water enough to cover 3 2 of **

3) Hang ** with a thread, you can only use a circle to tie it up to hang **, **do not get wet and other sundries.

4) Place the cup of water on the electronic scale to zero.

5) Slowly put the hoisted ** into the water cup, stay for about 15 seconds to get the accurate number displayed on the electronic scale, remember not to touch the low cup wall.

6) Calculate, **weight divided by the number obtained by hanging water, that is, the content of ** (**density is:

In this way, for the ** water hanging method, the general standard is to adjust the water temperature at 25.

The formula for calculating hanging water is: Fineness = weight in air Weight in water.

If: there is a piece of **100 grams, which is weighed as 7 grams in water, and there is a formula: **fineness **weight in air **weight in water, then: **fineness 100 7.

**：

It is the elemental form of the chemical element gold (AU), which is a soft, golden-yellow, corrosion-resistant ***. Gold is one of the rarest, more precious and most highly valued metals.

In ancient China, "tael" was used as the unit of Huang Chi Gaobu, which is a very important metal.

It is not only a special currency for reserves and investment, but also an important material for the jewelry industry, electronics industry, modern communications, aerospace industry and other sectors.

The chemical symbol is AU, and the financial English is XAU or the name is derived from a story of Aurora, the goddess of the dawn in Roman mythology, which means shining dawn.

As of October 12, 2021, **** $1760 ounces.

The color formula is: weight in air divided by weight in water by 50

For example: there is a piece of **100 grams, which is 7 grams in water.

There is a formula: Fineness = Weight in air Weight in water

Then: Fineness = 100 7