cracked‚ or fractured. Water from the atmosphere is immediately attracted to it’s surface and begins it’s diffusion into the glass. The process of hydration continues until the fresh obsidian surface contains 3.5 percent of water‚ the saturation point of the process. To be observed under a microscope‚ the results of the hydration must be identified into thin sections out normal to the surface. A diffusion front can be recognized by a change of the inner edge of the hydration rind‚ which is refractive
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Capacity that the air can hold) Saturation Mixing Ratio- The water vapor capacity of air at given temperature. As temperature increases‚ water vapor capacity of air also increases. Dew Point Temperature- Conceptual Framework: As temp. of parcel of air decreases R.H. increases When Parcel of air has cooled to the dew point of temp‚ it becomes saturated and condensation takes place. With altitude pressure decreases – as parcel of air rises – it comes under low pressure – and expands. Adiabatic –
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PART II 5. (a) On the windward side of the mountain‚ should the relative humidity of the parcel change as it rises from 2000m to 4000m? (a) No‚ the relative humidity should not change. (b) The elevation at which the parcel of air reaches its dep point temperature is called the lifting condensation level. The LCL in this example was 2000m‚ so the relative humidity is at 100% already. 6. As the air rises up the windward side of the mountain: (a) What is the capacity (saturation mixing ratio) of
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Questions for Making Clouds Grow Activity Activity 4.4: Part 1 1. Set the dew point to 20°F. When the temperature is 35°F‚ what is the altitude of the cloud? 3400 At what temperature does a cloud form at 9500 feet? 62 degrees 2. Set the temperature to 70°F. What happens to the altitude of the cloud as you raise the dew point from 20°F to 65°F? goes down Why? Cool air is unable to penetrate clouds above due to subsidence inversion. 3. Based on your observations‚ what is more
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HVAC Systems: Air Conditioning Dr. Harjit Singh Room 116 Howell Building harjit.singh@brunel.ac.uk Fridays 09.30 – 11.30am Unless otherwise specified For students enquiries: 1 Building Services Engineering: Building Air Conditioning Module (ME5508)‚ Brunel University Introduction to the module • Credit: 15 • Teaching materials: – Provided for the MSc students. – Undergrads: Buy them from the stores. • Assignment: to be handed two weeks before Xmas‚ deadline-28 Jan 2013 • Students
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surface C) unending circulation of Earth’s water supply D) latent heat of vaporization E) totality of forms of precipitation 2. Air containing all of the water vapor it can hold is ________. A) saturated B) adiabatic C) dew point D) convective E) unstable 3. The release of latent heat along from water molecules on a wet surface is called ________. A) vapor pressure B) specific humidity C) condensation D) evaporative cooling E) none of the
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Drying We are primarily concerned with drying wet‚ porous solids (granules). Important to ensure proper moisture content in the granules: low enough to prevent product degradation and ensure good powder flow‚ but high enough to provide good tablet properties B. Amsden CHEE 440 Definitions psychrometry determination of the vapor concentration and carrying capacity of drying gas wet bulb T dry bulb T relative humidity (RH) Pwater in air %RH = ×100 Pw‚sat(T ) moisture content B. Amsden CHEE
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I. The Atmosphere - envelope of gases and tiny‚ suspended particles encircling the Earth A. Meteorology - study of the atmosphere and weather processes - studies of atmosphere involves many sciences B. Weather - the state of the atmosphere at a given time and place C. Climate - sum of all statistical weather information that helps describe a region Climatology - the study of climate D. The Scientific Method - means of discovering basic scientific principles 1. Pose
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Humidity & Relative Humidity Humidity is defined as the amount of moisture in the air. Air contains a certain amount of water vapor. The amount of water vapor any mass of air can contain depends on the temperature of that air. The warmer the air is‚ the more water it can hold. A low relative humidity means that the air is dry and could hold a lot more moisture at that temperature. For example‚ at 20 degrees C (68 degrees F)‚ a cubic meter of air can hold a maximum of 18 grams of water. At
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These rodents are fairly widespread in dry areas of North and central America. They are examples of mammals which are specialised to live in a rather inhospitable environment. It is worth pointing out certain facts about their lifestyle and biology. The animals’ diet is principally seeds‚ gathered at night and stored in underground burrows. They have large cheek pouches like hamsters for temporarily storing this material during their brief forays to the surface at night time when the air is
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