We have a bucket with half a bucket of water in it. Now we know that the weight of this half bucket of water is 18kg. Our task is to find out how many grams the whole bucket (including the weight of water and bucket) weighs when it is full of water. Suppose the weight of the bucket is b kg, and the weight of half a bucket of water is w kg. Then, B+W = 18kg (the weight of half a bucket of water).

According to the topic, the following equation can be established: B+W= 18 (the weight of half a bucket of water or even a bucket). After being filled with water, the weight of water is 2×W (because there is half a bucket of water now, the weight of water has doubled). Therefore, the total weight of the bucket filled with water is B+2×W kg.

Using the mathematical equation, we can express it as: B+W= 18 the weight after being filled with water =B+2×W Now we need to calculate the weight after being filled with water. The calculation result is that the total weight of the bucket is 36 kg or 36000g after it is filled with water.

A substance with a mass of 1 kg is called 1 kg when it is subjected to an external force of 9.8 Newton. Generally, mass units are often used instead of weight. Commonly used mass units are: microgram (ug), milligram (mg), gram (g), kilogram (kg), ton (t) and so on. In China, gold and beams used to be used as units of weight. Pounds, ounces, carats, etc. Also used as a unit of weight.

Calculation method of weight

1, mass multiplied by gravitational acceleration: W=mg, where w is weight, m is mass and g is gravitational acceleration. The acceleration of gravity on the earth's surface is about 9.8m/s? .

2. Calculate the gravity of an object: use the formula G=mg, where g is gravity, m is mass and g is acceleration of gravity.

3. For regular iron blocks, the weight is equal to the density multiplied by the volume: weight = length× width× height x7.8/ 1000, where the length, width and height are all calculated in centimeters.