MASS BALANCES - University of Washington
Mass balances help us answer questions about the rate at which pollutants accumulate in a system, the maximum concentration that a pollutant might reach at a point in a river following an upstream spill, or the size of a reactor that we have to
Chapter 4 Mass and Energy Balances
Mass and Energy Balances In this chapter we will apply the conservation of mass and conservation of energy laws to open systems or control volumes of interest The balances will be applied to steady and unsteady system such as tanks, turbines, pumps, and compressors 4 1 Conservation of Mass The general balance equation can be written as
Chapter 21 : Balancing of Rotating Masses
21 5 Balancing of Several Masses Rotating in the Same Plane Consider any number of masses (say four) of magnitude m 1, m 2, m 3 and m 4 at distances of r 1, r 2, r 3 and r 4 from the axis of the rotating shaft Let θθθ θ 12 3 4,, andbe the angles of these masses with the horizontal line OX, as shown in Fig 21 4 (a) Let these masses
BALANCING OF ROTATING MASSES
2 Balancing of a single rotating mass by two masses rotating in different planes 3 Balancing of several masses rotating in the same plane 4 Balancing of several masses rotating in different planes STATIC BALANCING: A system of rotating masses is said to be in static balance if the combined mass centre of the system lies on the axis of rotation
Chapter 4 MATERIAL BALANCES AND APPLICATIONS
The systems about which balances might be taken are shown on the following representation of the flowchart 1 2 40 kg/h 0 900 kg A/kg 0 100 kg B/kg 30 kg/h 0 600 kg A/kg 0 400 kg B/kg 30 kg/h 0 300 kg A/kg 0 700 kg B/kg 100 kg/h 0 500 kg A/kg 0 500 kg B/kg 1 2 3 40 kg/h 0 900 kg A/kg 0 100 kg B/kg 30 kg/h 0 600 kg A/kg 0 400 kg B/kg 30 kg/h
SOLID MECHANICS BALANCING TUTORIAL – BALANCING OF ROTATING BODIES
Three masses A, B and C are placed on a balanced disc as shown at radii of 120 mm, 100 mm and 80 mm respectively The masses are 1 kg, 0 5 kg and 0 7 kg respectively Find the 4th mass which should be added at a radius of 60 mm in order to statically balance the system Figure 7 SOLUTION
Weighing Measurements: The Balance
Analytical Balances The analytical balance can measure mass to the nearest tenth of a milligram (0 1 mg or 0 0001 g) It is a more sensitive instrument than the beam balance, and is used for measuring small quantities of material or when very accurate weighings are required Adapted from Richards, L & McGee, T H
AdventurerTM Balances Instruction Manual
accurate weighing results Most Adventurer Balances have built in AutoCal which can calibrate the balance automatically and does not require calibration masses If preferred, the balance can be manually calibrated with external masses Have the appropriate calibration masses available before beginning calibration Refer to the
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