Why should air velocity in branch ducts be limited to 600 fpm? (57.13) If air moves faster than 600 fpm it begins to make noise. 10. Why are duct friction charts designs for sheet metal not accurate for fiberglass duct board or flexible ducts? (57.11) Most duct friction charts are designed for sheet metal not fiberglass or flex duct.
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Take sample of Zinc Iodide and dissolve in solution. Then, take the battery, with exposed wire tips attached, and place the tips into the solution. In about 1-2 minutes, there should be a red-brown color coming out of one of the wires, and a dark substance depositing on the other wire, these should iodine and zinc respectively. 2. What are the identities of the substances found after electrolysis and heating?
Research and Apply Project Worksheet Select one type of fossil fuel (Coal, Petroleum or Natural Gas) and one type of renewable energy resource (Solar power, Wind power, Hydropower, Geothermal power, or Biomass). Research and record the information in the chart. If you would prefer to use a different format to present this information, that is fine; however, you must include all the information on the chart in order to receive full credit for this assignment. | Fossil Fuel: Sulfur Dioxide | Renewable resource: Recycling | Describe this resource | | | Advantages of this resource | 1. Sulfur Dioxide2.
Radiographic film on the opposite side of the source is exposed when it is struck by radiation passing through the objects being tested. More radiation will pass through if there are cracks, breaks, or other flaws in the metal parts and will be recorded on the film. By studying the film, structural problems can be detected. Co-60 is used because it is an emitter of gamma rays which will penetrate metal parts. Co-60 has a half-life of 5.3 years and can be used in a chemically inert form held inside a sealed container.
Fiber Advantages The following advantages of fiber over other cabling systems are: (Oliviero 250) Immunity to electromagnetic interference (EMI), higher data rates, longer maximum distances, and better security. With copper cabling there is one common cabling problem they are susceptible to EMI. EMI is a stray electromagnetism that interferes with the signal. All electrical cables generate a magnetic field around their central axis. If you pass a metal conductor through a magnetic field an electrical field is generated in that conductor.
Also, the more stable the free radical that is left behind, the weaker its C-H bond strength will be. The difference between the bromine and chlorine product ratios can be partially explained by the Hammond postulate, which states that species with similar energy levels also have more similar structures and react more quickly and less selectively. In the experiment, five different hydrocarbons were tested to measure the rate of reaction with the addition of bromine. Two trials were done, one with the test tubes containing the hydrocarbons and added bromine sitting directly under a lamp, and another with the test tubes in a closed, dark space. Both trials contained a
Speed of Sound A. Objective The objective of this laboratory was to measure the speed at which sound was traveling through the air, using the resonance of longitudical waves. B. Equipment Used * Tall glass of water * PVC Pipe, 10 in. * Tape measure, 3 m * Mercury thermometer * Tuning fork, 384 Hz * Marker pencil * Block of wood C. Data Table 1: Tuning fork frequency (Hz) | Length, L Water level to top of the tube (m) | D= diameter of tube (m) | Wavelength=4(L+0.3d)(m) | Room temperature (degrees C) | 384 | 0.218 | 0.020 | 0.896 | 24 | D. Calculations A.
4. Howell iron works purchased came with a furnace which was named Howell Iron works then traditionally pig iron would be worked into wrought iron in finery forges and later putting the furnaces more recently into steel. In these processes, pig Iron is melted and a strong current of air is directed over it while it is being stirred or agitated. This cause the dissolved impurities to be thoroughly oxidized. An intermediate known as refined iron, refined metal, and refined iron.
Experiment #4 – Properties of Gases May 31, 2014 11:58 am UCHM 240 General Chemistry I Abstract: This lab will give the opportunity to explore some physical and chemical properties of gases and use these properties to identify gases when they are present. Purpose: In this lab we will examine some common visible physical properties of gases. We will also compare chemical properties of gases against one another. We will then attempt to identify these gases with the properties we have observed. The gases being observed in this lab are hydrogen (H2), oxygen (O2), and carbon dioxide (CO2).