How do you calculate weight by age?
Three simplified linear equations were derived to calculate mean weight for age. For Infants < 12 months: Weight (kg) = (age in months + 9)/2 For Children aged 1-5 years: Weight (kg) = 2 x (age in years + 5) For Children aged 5-14 years: Weight (kg) = 4 x age in years.
How do you calculate the weight of a tube?
Theoretical Steel Weight Chart
- Steel Plate. • Formula: length(m)×width(m)×thickness(mm)×7.85.
- Steel Tube. • Formula: (OD-wall thickness)×wall thickness(mm)×length(m)×0.02466.
- Steel Rod. • Formula: dia.(mm)×dia.(mm)×length(m)×0.00617.
- Square Steel.
- Flat Steel.
- Hexagonal Steel.
- Rebar.
- Flat Steel Tube.
What is the formula for volume of pipe?
For a pipe use its length instead of height: pipe volume = π * radius² * length , where radius = inner diameter/2 . The volume of a pipe is equal to the volume of a liquid inside (if a pipe is fully filled with it).
What is the volume of a 2 inch pipe?
Volume and Weight of Water for Common Pipe Sizes
| Pipe Size | Volume | |
|---|---|---|
| in | in3/ft | gallons/ft |
| 2″ | 37.699 in3 | 0.1632 gal |
| 2 1/2“ | 58.905 in3 | 0.255 gal |
| 3″ | 84.823 in3 | 0.3672 gal |
How do you calculate the volume of water flow in a pipe?
The volume of a portion of the fluid in a pipe can be written as V = A d V=Ad V=AdV, equals, A, d, where A is the cross sectional area of the fluid and d is the width of that portion of fluid, see the diagram below.
What is the formula for calculating flow rate?
Q=Vt Q = V t , where V is the volume and t is the elapsed time. The SI unit for flow rate is m3/s, but a number of other units for Q are in common use. For example, the heart of a resting adult pumps blood at a rate of 5.00 liters per minute (L/min).
How do you calculate the flow rate of a pipe diameter?
With a radius, for instance, of 0.05 meters, 0.05 ^ 2 = 0.0025. Multiply this answer by the pressure drop across the pipe, measured in pascals. With a pressure drop, for instance, of 80,000 pascals, 0.0025 x 80,000 = 200. Multiply the constant pi by the answer to Step 1: 3.142 x 0.0025 = 0.00785.
What is the mass flow rate of water?
Mass flow rate can be calculated by multiplying the volume flow rate by the mass density of the fluid, ρ. The volume flow rate is calculated by multiplying the flow velocity of the mass elements, v, by the cross-sectional vector area, A.
What is the difference between mass flow rate and volume flow rate?
Mass flow measures the number of molecules in a flowing gas. Volumetric flow measures the space that those molecules occupy. Because gases are compressible, volumetric flow rates can change substantially when pressure or temperature changes. Volumetric flow rate can also be called actual flow rate.
How does a flow rate in a pipe depend on its diameter?
The radius is half the diameter. Flow rate varies inversely to length, so if you double the length of the pipe while keeping the diameter constant, you’ll get roughly half as much water through it per unit of time at constant pressure and temperature.
How does flow rate affect pressure?
Under laminar flow conditions, pressure drop is proportional to volumetric flow rate. At double the flow rate, there is double the pressure drop. Under turbulent flow conditions, pressure drop increases as the square of the volumetric flow rate. Pressure drop increases as gas viscosity increases.