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- The absolute humidity at atmospheric pressure at 25 ° C is 0.017 kg water / kg dry air. Specify: a. Partial pressure of water vapor. = kPa b. Relative humidity = % c. Dew point temperature. = (°C)1. The space satellite Explorer V was made of aluminum and had a diameter of 36.0 cm at 0°C. It cooled off to -35°C when it reached its orbital height. What is the change in volume? (INCLUDE FBD) 2. A petroleum sample has a specific gravity of 0.847 at 20°C. If the coefficient of volume expansion of the petroleum is 0.000899 per °C, what is the specific gravity at 70°C? 3. Liquid oxygen freezes at -218.4°C and boils at 183°C. Express these temperature in terms of Fahrenheit scale.3. Suppose the relative humidity of the air was 96% on a cold morning when the temperature was 20 °C. In the afternoon, the air temperature has risen to 35 °C, but the actual amount of water vapour in the air is the same as it was in the morning. The barometric pressure is also the same as it was in the morning. What is the approximate relative humidity in the afternoon?
- 17. Which of the following three statements concerning relative humidity values of 30% and 40% are true? Note that when the relative humidityis 30%, the air temperature may be diff erent than it is when the relativehumidity is 40%. A. It is possible that at a relative humidity of 30% there is a smaller partial pressure of water vapor in the air than there is at a relativehumidity of 40%.B. It is possible that there is the same partial pressure of water vapor in the air at 30% and at 40% relative humidity. C. It is possible that at a relative humidity of 30% there is a greater partial pressure of water vapor in the air than there is at a relative humidity of 40%.(a) A, B, and C (b) Only A and B (c) Only A and C (d) Only B and C(e) Only A5. A volume of 450 cm³ of air is measured at a pressure of 740 mm Hg absolute and a temperature of 20°C. If the pressure and temp changes to 760 mm Hg absolute and 0°C. Determine the final volume in cm³.5 : Calculate R.M.S. speed of nitrogen at 0°C. (Density of nitrogen = 1.25 kg/m³ at N.T.P.1 %3| atmosphere = 1.013 × 105 N/m²).
- 17. Balloons used helium at atmospheric pressure 101.325kPa and temperature 26°C. It is projected to lift and move logs from almost distant forest areas by means of balloons. What minimum balloon diameter will be required for a gross to move upward force of 30metric tons? a. 37.1934m b. 37.3607m c. 37.3190m d. 37.40226m34 : At what temperature will be R.M.S. velocity of a gas be double its value at N.T.P.? (a) 273°C (b) 546°С (c) 819°C (d) 1092°C6. At an altitude of 160 km, the density of air is 1.5 * 10 ^ - 9; kg / (m ^ 3) and the temperature is approximately 500 K. What is the pressure ?
- The average January temperature for Kathmandu, Nepal is 49.3 °F, and the average July temperature is 75.0 °F. 1. What is the difference between the July and January temperatures in the Rankine scale? 2. What is the difference between the July and January temperatures in the Celsius scale? 3.1. Find the variation of atmospheric pressure with elevation in the earth’s atmosphere. Assume that at all elevations, T= 0°C and g= 9.80m/s22) A hot-air balloon can carry mass about the difference between the mass of air displaced by the balloon and the mass of the gas inside the balloon. A scientist wants to investigate mass lifting using a sphere balloon, 4.00 m in diameter and heated air at 70 °C at Kapadokva. The air temperature and atmospheric pressure at Kapadokya are 25 °C and 755 torr. The pressure in the balloon is also equal to the atmospheric pressure. a. What total mass can the balloon lift? Assume that the average molar mass of air is 29.0 g/mol. (Hint: Heated air is less dense than cool air.) b. If the balloon is filled with enough helium (4.003 g/mol) at 25 °C and 755 torr to achieve the same volume as in part a, what total mass can the balloon lift?