（1）20m/s=______ km/h；（2）108km/h=______ m/s

（1）20m/s=______ km/h；（2）108km/h=______ m/s

∵ 1m / S = 1 × 10 − 3km13600h = 3.6km/h, ∵ (1) 20m / S = 20 × 3.6km/h = 72km/h; (2) 108km / h = 1083.6m/s = 30m / S; so the answers are: 72, 30

How many cubic meters of natural gas is 56 kg

The standard cubic meter of natural gas refers to 1 cubic meter at 20 ℃ under 1 atmospheric pressure
Under this condition, any gas with 22.4 liters contains one mole (6.02 × 10 ^ 23)
One cubic meter is 1000 liters
The main component of natural gas is methane with a molecular weight of 16. The molecular weight of a methane is about 16 hydrogen atoms and 16 protons
The proton mass is 1.6726231 × 10 ^ - 27 kg
Therefore, the quality of one cubic meter of natural gas is:
1.6726231×(10^-27)×16×6.02×(10^23)×1000÷22.4
=0.7192kg
The volume of natural gas per ton is:
7192 = 1390 m3
56kg = 56 / 0.7192 = 77.864m3

How many cubic meters of compressed natural gas is 1 kg

One cubic meter of natural gas is equal to 0.7143 kg
One cubic meter is equal to 1000 liters at any time, as long as the temperature and pressure are constant
In addition, for the ideal gas, PV = NRT, if the pressure changes, we must know the temperature and pressure before and after the change in order to know the volume change
Or the problem is a M & # 179 under 20MPa; how many liters is it under the standard condition, which is meaningful. From the above formula, it can be seen that the volume of pressure box is inversely proportional under the condition of constant temperature

How many cubic meters of natural gas is the calorific value of a bottle of 15kg liquefied gas equal to

One kilogram of liquefied gas is about 460l, that is, 0.46m3; one kilogram of natural gas is about 740l (calculated according to the density of 12t), that is, 0.74m3; therefore, one kilogram of liquefied gas is about 1.6m3 of natural gas
seventeen point eight eight two three

How many cubic meters is a kilogram of LPG equal to pipeline gas?
How many cubic meters of pipeline gas is a kilogram of bottled LPG?

45, but the calorific value is different,
I suggest natural gas

How many cubic meters of LPG is 15 kg LPG?

Sorry, I made a mistake just now. Liquefied gas is 70% propane and 30% butane. Its density is 0.57 times that of water. Therefore, 15kg liquefied gas is about 0.026 cubic meters of liquefied gas!

How many cubic meters is 15 kg LPG?
I don't know what the pressure is. What I want to ask is the capacity or calorific value of a 15kg tank of liquefied gas compared with that of natural gas

What's the pressure

What is the flow rate per hour when the water pressure is 0.25 MPa and the pipe diameter is DN 150
The water pipe is galvanized pipe. There should be a calculation formula. In short, the more detailed the better. Thank you! I'll give you 10 points!

The flow rate is 1.5m/s, the hourly flow rate is 0.150 * 0.150 * 3.14 * 1.5 * 60 * 60 * / 4 = 95 tons

Help: known pipe diameter D (unit: m), the medium in the pipe is water, the water pressure is 0.2MPa, find the water flow Q per hour, help the calculation formula! Thank you

According to the water pressure, the velocity V can be obtained,
The relationship between flow rate, velocity, cross-sectional area and water pressure is as follows
Q=μ*A*(2*P/ρ)^0.5
Where Q -- flow, m ^ / S
μ - flow coefficient, related to the shape of valve or pipe; 0.0.65
A -- area, m ^ 2
P -- pressure difference before and after passing through the valve, unit: PA,
ρ - density of fluid, kg / m ^ 3;
Reference: engineering fluid mechanics

It is known that the water pressure P = 0.2MPa, the pipe diameter DN = 20mm, the end open, and the flow rate?

Bernoulli theorem
Exit velocity v = (2 (p2-p1) / ROU) ^ 0.5
v=14.14m/s
Q=vA=0.00444m^3/s=4.44L/s