1, looking for a balance lever. Use clothes racks, chopsticks, etc. The clothes rack can be hung on the clothesline. The middle part of chopsticks can be placed on the mouth of a bottle or on the back of a chair.
2. Look for items that can be used as weights. For example, we can use edible salt as a weight. Generally, the edible salt is 400g or 500g. You can also use our snacks or drinks.
3. Put a convenient bag at each end of the clothes rack, one of which is filled with salt or other items. Add flour to the other convenient bag until the two ends are balanced.
Expand knowledge:
1, China has a specific unit of measurement, international units of measurement, kilograms and tons, pounds in the United States and Britain, and so on.
2, the unit of weight, has a long history, in ancient times, countries have their own units of measurement, the ancient unit of weight in China, Jun: 30 Jin is a jun; Ten guineas weigh one baht, twenty-four baht one or two, and sixteen pounds.
3. The pound is the unit of weight in Britain and America, abbreviated as lb. One kilogram is about 2.2 pounds, or one pound is a little more than 0.45 kilograms. A unit of weight used in a gold balance, expressed in Chinese as "pound". In the past, a one-pound coin was indeed made of a one-pound gold particle, but now the weight ratio of gold price to gold has become a freely floating relationship.
4. oz (translated from Hong Kong into ounces) is an English unit of measurement, and the symbol is ounce or Oz. As a unit of weight, it is also called English ounces.
5. Carat was first used by ancient Arabs. It is not a special unit of measurement, but a fruit called carob. One of the characteristics of this kind of fruit is that the weight of each fruit is roughly equal. Ancient Arabia produced many kinds of precious stones, but at that time, weighing instruments such as scales were not invented, which brought a lot of inconvenience to the commodity trade of ancient Arabs. In order to solve this problem, some people proposed to use the fruit of carob as the unit for calculating precious stones, which was supported by people. Gradually, using "carat" as the unit for measuring stone was fixed, and it was widely adopted by all countries in the world.
6. Equal arm lever is a kind of lever. The power arm and the resistance arm have the same length, which is neither labor-saving nor laborious, and neither saves nor costs distance.
References:
Lever principle-Baidu encyclopedia
? Equal arm lever-Baidu encyclopedia
? Steel Scale (Principle) Baidu Encyclopedia