If you needed scales, as an option, they can be made of girlfriend. The most accurate will be so-called lever scales, on which the weight is determined using the weight of the weight. Make them very simple.
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Support for your scales can serve any hook on a wall or a specially robbed nail.
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Now you need a long one, preferably at least 30 cm, a flat cane. You can take a wooden chapter or ruler. In the lever scales that we do, it is called the rocker. The longer the shoulder of the rocker, the more accurate will be the result of weighing. On the prepared ruler or skewer, we mark the middle and from it from two sides, I measure the same distance from two sides, here you will be attached to the scales. Make in the designated openings of the hole with a seboard or thin drill. In the middle, tie a strong kapron thread.
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Bowls for weights can be made of any cape or iron cover, cut a plastic or paper cup. Now in a circle of the bowl, at the same distance, take three or four holes in which to last and make a drop-down thread. Before tiering the threads from the bowl to the rocker, tie them to the knot.
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Make an arrow, which will later point to the equilibrium. Cut an equilateral triangle from the cardboard and stick it in the middle of a wooden skewer or a ruler, where you have a central thread. So that exactly the strained thread takes place strictly in the middle (biscomers) of the triangle.
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Central thread tie your scales to hook.
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Now calibrate the scales, fixing on the bottom of each of the cups, the desired amount of plasticine, so that the top cutting the triangle you coincides with the stretched thread now and in suspended state. Scales are ready! If you are all done correctly, the measurement will be quite accurate.
Using such weights is very simple. On one of the cups, you put the item you want to weigh, and lay out the licensses (if any) or a trifle. Each nominal coin has its own weight. When the arrow indicates equilibrium, we count the total weight of the coins in the bowl. This will be the exact mass of things that interest you. There is a way simpler, but less accurate. In one teaspoon, 5 grams of water, brunt and 8 grams of sugar sand. On one basis of the scales, put the item that needs to weigh, and in another mad sugar, a ramp or water, not forgetting to count tea spoons.
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