Can an airplane fly at a pressure altitude of 4 km and a temperature altitude of 3.5 km? why
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Can an airplane fly at a pressure altitude of 4 km and a temperature altitude of 3.5 km? why?
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- On the moon the surface temperature ranges from 359 K during the day to 0.99 ✕ 102 K at night.(a) What are these temperatures on the Celsius scale? °C to °C(b) What are these temperatures on the Fahrenheit scale? °F to °FThe summit of a mountain is 3240 m higher than a point in the foothills. Assume that the atmospheric lapse rate in this area is the same as the global average of -6.5°C/km. What is the temperature of the summit when eager hikers depart from the foothill location at a temperature of 28°C?The density of water that is at 0°C is very nearly 1000 kg/m³ (it is actually 999.84 kg/m³), whereas the density of ice that is at 0°C is 917 kg/m³. Calculate the pressure necessary to keep 4.6 m³ of water from expanding when it freezes, neglecting the effect such a large pressure would have on the freezing temperature. (This problem gives you only an indication of how large the forces associated with freezing water might be.) The bulk modulus of ice is 2.20 x 109 N/m². How is density related to the mass and volume of a substance? How is the change in volume due to expansion or contraction related to the thermal stress? N/m²
- Suppose you have a large hot air balloon, open at the bottom but filled with air that is heated to 50 °C while the outside air is 10 °C. What can you say about the air inside the balloon and how much it can lift? The density of air is surprisingly high: 1.23 kg/m3, an average hot air balloon has a volume of 3000 m3 , and the acceleration of gravity is 9.8 m/s2. The density is higher by the factor (273 + 50)/(273+10) = 1.14 and therefore will not have a buoyant force and will not lift off the ground with any load. The density is lower by the factor (273 + 10)/(273+50) = 0.88 and therefore will have a buoyant force of 0.88 times the weight of the air it replaced, or about 32,000 N. The density is lower by the factor (273 + 10)/(273+50) = 0.88 and therefore will have a buoyant force of 0.12 times the weight of the air it replaced, or about 4300 N. The density is the same but the pressure of the hot air is higher by (273 + 50)/(273+10) =…A car tire has a gauge pressure of 205,749 Pa, volume of 3 L, and temperature of 7°C. After several hours of driving, the temperature of the air increases by 17C° and 11% of the gas leaks out due to a nail stuck in the tread. Calculate the gauge pressure of the tire in psi at this time if the ambient atmospheric pressure is 1.00 x 105 Pa. Neglect any volume change of the tire. (1000 L = 1 m³; 1 psi = 6895 Pa) (Be careful with units!) Pgauge psiSaturn's moon Titan has a mass of 1.3452 x 1023 kg , a diameter of 5,150 km, and an atmosphere made mostly of N2 at a constant temperature of -179 degrees Celsius. Assume that the pressure at the surface is 50% more than on Earth. What is your best estimate of Titan's atmosphere's R constant?