Using average specific heats, explain how enthalpy changes of ideal gases and incompressible substances can be determined
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Using average specific heats, explain how enthalpy changes of ideal gases and incompressible substances can be determined
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- Using average specific heats, explain how internal energy changes of ideal gases and incompressible substances can be determined.How does the pressure vary at depth (Z) in liquid and gaseous fluids, and explain the reasons why there are differences.Describe incompressible substances and determine the changes in their internal energy and enthalpy.
- A 1.6-mm-diameter tube is inserted into an unknown liquid whose density is 960 kg/m3, and it is observed that the liquid rises 5 mm in the tube, making a contact angle of 15°. Determine the surface tension of the liquid.The pressure on the suction side of pumps is typically low, and the surfaces on that side of the pump are susceptible to cavitation, especially at high fluid temperatures. If the minimum pressure on the suction side of a water pump is 0.70 psia absolute, determine the maximum water temperature to avoid the danger of cavitation.What does the coefficient of volume expansion of a fluid represent? How does it differ from the coefficient of compressibility?
- What is the general difference between the coefficient of volume expansion of solids and liquids? ExplainFreshwater and seawater flowing in parallel horizontal pipelines are connected to each other by double U-tube manometer, asshown. Determine the pressure difference between the two pipelines. Take the density of seawater at the location to be 1035 kg/m3. Can the air column be ignored in the analysis?aerodynamics: Determine the difference between the total pressure of an aircraft flying at sea level, and an aircraft flying at 5KM? Both have a velocity of 100m/s.
- Freshwater and seawater flowing in parallel horizontal pipelines are connected to each other by a double U-tube manometer, as shown. Determine the pressure difference between the two pipelines. Take the density of seawater at that location to be ? = 1035 kg/m3. Can the air column be ignored in the analysis?The temperature and pressure at the surface of Mars during a Martian spring day were determined to be -56 oC and 433 Pa, respectively. (a) Determine the density of the Martian atmosphere for these conditions if the gas constant for the Martian atmosphere is assumed to be equivalent to that of carbon dioxide. (b) Compare the answer from part (a) with the density of the earths atmosphere during a spring day when the temperature is 18 oC and the pressure 101.6 kPa (abs).A glass tube 1.6m long and having a diameter of 2.5cm is inserted vertically into a tank of oil (s.g. = 0.80) with the open end down and the closed end uppermost. If the open end is submerged 1.30m from the oil surface, determine the height to which the oil will rise in the tube. Assume barometric pressure is 100 KPa and neglect vapor pressure.