## A simple experiment

The volume of water is often measured in liters. Weigh 1 l of distilled water is easy. To do this:

- electronic scales;

- measuring utensils;

Bank;

- water.

Distilled water you can buy in the store, which sells auto parts and other goods for motorists, as well as in the pharmacy. Bank better to take the glass. Chemical glassware for experiments with water is not required. Weigh an empty jar. Pour in exactly 1 litre of water and weigh again. Subtract the second result of the first. You'll have a lot of water. And you will see that it is equal to 1 kg. If you have water from the tap or from the well, she may weigh a little more due to the dissolved salts. The error is usually insignificant for school and experience the difference can be neglected.

## Converting measures of volume

Remember, what is It 1 liter is a thousand cubic centimeters, that is, one cubic decimeter. In turn, in one cubic meter a thousand cubic decimeters. To verify this, it is enough to cube the ratio 1 m = 10 DM. what is the weight of 1 dm3, you have already calculated. Remember, what is ton. It is equal to 1000 kg. That is, one ton weigh 1000 dm3 of water. It turns out that 1 cubic meter of distilled water will weigh exactly 1 ton.

## Other liquids

Distilled leading is a kind of benchmark, which can be used for weighing other items. After all, it costs nothing to turn a jar of water in the weights. Filling it a certain amount of water, you'll know exactly how much it weighs, so you can use this "weight" and to work with mechanical weights. Calculate the ratio of mass and volume of other liquids it just won't work. There is one further value – density. You can find it in the table of densities of various chemical substances. Calculate the density according to the formula ρ=m/V where m is mass, and V is the volume. To find mass, you need density multiplied by volume. The same equation we can calculate the mass of 1m3 of water. The density of water is equal to 0,9982 g/cm3, but for calculations that do not require very high precision, it is usually taken as 1 g/cm3. Substituting this value into the formula, you get m = ρ*V = 1 g/cm3 * 1000000 cm3 = 1000000 g = 1000 kg = 1 t

In the same way we can calculate the mass of solids, if it can't scale, but it is possible to measure the volume and it is known which substance it is made. To calculate the mass of the body, consisting of several parts, we can take the average density, but the calculations will be a big error.

# Advice 2: How to bring water into the house from the well

The lack of water in a private home gives a lot of trouble. To conduct water from the nearby well will not be difficult, it is enough to read the instructions, tips and to purchase all necessary equipment and materials.

You will need

- submersible electric pump;
- polypropylene pipes of the necessary length;
- - insulation for pipes;
- cable electric;
- - shovel;
- - the hose.

Instruction

1

Make sure the well is clean drinking water, and there is a real opportunity to connect the well to the house water pipe. In the case of a too distant of the well, will be more economical and effective to dig a new well closer to home.

2

Using spades and shovels, dig a trench of medium depth (40-60 cm, width 20-25 cm) from the house to the well, then take the pipe and check if it would fit to supply water to the house from the well. If the tube is of insufficient length, then you can buy the missing footage and connect the pipe to special pipe.

3

Place the pipe in the excavated trench. One end of the pipe enter the house, and the second enter into a special hole in the wall of the well.

4

When the water pipe will be laid in a trench you can start laying another, smaller diameter pipe that will be used for laying of electric cable. Pass the electrical cable throughout the length of the second tube. Both pipes securely to insulate and protect from freezing in the winter.

5

Take the electric submersible pump and lower it into the well. Connect the special hose pump and water pipe, adjust the height and pressure of water, give the pump a stationary position by means of the additional elements of wire or cable cords. Turn on the pump to the network.

6

You can conduct a trial run of the pump and check its efficiency, if done correctly - from the well to the house to start the flow of water.

Note

Do not operate the pump in extreme cold, remove it from the well to avoid failure.

Useful advice

It is advisable to purchase a pump with a blocker, which will monitor the pump temperature and save it from overheating and damage.

# Advice 3: What is the weight of a liter of water?

The need to determine the mass of an object in the absence of weights occurs quite often. The simple weights can be made of vessel with water, but you need to know how much weight the desired amount of water.

## Experiment

To determine the mass of 1 l of distilled water you can use a fairly simple experiment. For it will need:

- distilled water;

- measuring utensils;

- glass or plastic Bank;

- electronic scales.

Distilled water you can buy in the pharmacy or in a shop for motorists. Measuring utensils are quite often sold in hardware stores, and electronic scales. Weigh the jar, write down its mass. Pour into a measuring bowl with exactly 1 liter of water. Pour water into the jar, weigh. Subtract the mass of the banks. You will get the result close to 1 kg. the Most accurate weighing is obtained at a temperature of 4°C and a pressure of 760 mm Hg. Under these conditions, 1 l of distilled water has a mass of 998,5 G.

Since aggressive substances, you will not run, chemical ware in this case is not mandatory.

## The water is a different

Spend the same experiment with ordinary tap water. Similarly, weigh the jar, fill it with water, pre-measure volume with volumetric glassware. The result will differ, although not by much. In tap water may contain impurities heavier substances, so 1 liter of water may weigh a little more than the same amount of distillate. Heavy water you are unlikely to get it, besides experimenting with it is definitely not worth it. The mass of 1 liter of such water will be much greater than 1 kg.

## No experiments

Calculate the mass of 1 liter of water and no experiments. Remember, what is equal to 1 liter Is 1 cubic. DM, that is 1000 cubic cm the Density of distilled water is 1 g/CC Mass m equal to the density ρ multiplied by the volume V. That is to calculate it by the formula m=V*ρ=1000 CC*1G/CC=1000 g

## Other volumes

In life sometimes you need to determine the mass of another volume of water. For example, bucket or Cup. It is important to know how much liquid this holds capacity. The standard glass usually includes 250 ml of water, i.e. ¼ L. in Order to calculate the mass of the water, just 1 kilograms divided by 4. You will receive approximately 250 g. If you weigh more accurately, the mass of water will amount to $ 249.6 m in Order to determine how much weight a bucket of water, you also need to know how much liquid is included in this bucket. For example, the number of ordinary tap water which is placed in a 10 litre bucket weighs about 10 kg, 12-liter – 12 kg etc.

## Other liquids

With the help of scales you can learn, for example, what is the weight of a liter of milk. Since the average density of milk the density of water, l will weigh a little more than a kilogram.

In the case of milk, you can only talk about the average density, since milk is a mixture of various substances.As for other liquids, it is best to calculate their weight according to the formula as it is not always possible to weigh the container. In addition, fluid can be aggressive to work with in the home in the absence of special chemical glassware is unsafe, the density of acid and alkali can be found in the table. You will only have to determine the volume of the vessel and to substitute the numbers into the formula.