(b) An experimental balloon filled with helium is equipped with meteorological instruments is released to the atmosphere from sea level. Measurement data was analysed to derive the linear temperature lapse rate up to high altitudes above sea level. The lapse rate was found to be equal to 0.0065 K/m. Estimate the altitude of the balloon above sea level when the atmospheric pressure is equal to 60 kPa. Atmospheric temperature and pressure at sea level may be assumed to be equal to 15°C and 101 kPa. Characteristic gas constant is 287J/kgK.

(b) An experimental balloon filled with helium is equipped with meteorological instruments is released to the atmosphere from sea level. Measurement data was analysed to derive the linear temperature lapse rate up to high altitudes above sea level. The lapse rate was found to be equal to 0.0065 K/m. Estimate the altitude of the balloon above sea level when the atmospheric pressure is equal to 60 kPa. Atmospheric temperature and pressure at sea level may be assumed to be equal to 15°C and 101 kPa. Characteristic gas constant is 287J/kgK.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Given that Initial Temperature = 28.5 deg C, Dew Point = 9 deg C, Dry Bulb = 30 deg C, Wet Bulb = 28 deg C, Saturation Pressure = 1.148 kPa Calculate the following:1. v = RaTPa m3/kg 2. ω = 1vkg/m3 where: Pd = saturation pressure at room temperature (from steam table) ω = density of air v = specific volume of dry air T = absolute temperature of room temperature Ra = gas constant of air =0.28706 kJ/kg-K
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