You have a two hundred-liter barrel. You plan it to fuel completely diesel which you use for heating of the mini-boiler house. And how many it will weigh, filled with solar? Now we will calculate.
It is required to you
- - table of specific density of substances;
- - ability to make the simplest mathematical calculations.
Instruction
1. To find the mass of substance on its volume, use a formula of specific density of substance.p = m/vzdes p there is specific density of substance; m – its weight; v – the occupied volume. We will consider weight in grams, kilograms and tons. Volumes in cubic centimeters, decimeters and measures. And specific density, respectively, in g/cm3, kg/dm3, kg/m3, t/m3.
2. So, under the terms of a task, you have a two hundred-liter barrel. It means: barrel with a capacity of 2 m3. Two hundred-liter it is called because waters, with its specific density to equal unit, such barrel includes 200 liters. You are interested in weight. Therefore you bring it in the presented formula to the first place.m = p*vB of the right part of a formula the value r – the specific density of diesel fuel is unknown. Find it in the reference book. Even more simply – to set in search inquiry on Internet "specific density of diesel fuel".
3. Found: density of summer diesel fuel at t = +200 C - 860 kg/m3. Substitute values in a formula: m = 860*2 = 1720 (kg) 1 ton and 720 kg – weigh 200 liters of summer diesel fuel so much. Having veiled previously a barrel, it is possible to calculate the total weight and to estimate rack power under a barrel with solar.
4. In rural areas useful is in advance to calculate the mass of firewood, necessary on a cubic capacity, to decide on the loading capacity of transport on which this firewood will be delivered. For example, for the winter the minimum in 15 cubic meters of birch firewood is necessary for you. Look for density of birch firewood in reference books. It: 650 kg/m3. Calculate weight, having substituted values in the same formula of specific density.m = 650*15 = 9750 (kg) Now, proceeding from loading capacity and the capacity of a body, you can decide on a type of the vehicle and the number of trips.