At an altitude of 11,000 m (a typical cruising altitude for a jet airliner), the air temperature is -52.5 ∘C and the air density is 0.356 kg/m3. The molar mass of air is 28.8 g/mol.
What is the pressure of the atmosphere at that altitude? (Note: The temperature at this altitude is not the same as at the surface of the earth, so the equation P=P0exp(−MgyRT) doesn't apply.)
At an altitude of 11,000 m (a typical cruising altitude for a jet airliner), the air...
A typical jet plane travels at 229 m/s at a cruising altitude of 7770 m. The windows on a jet plane measure 0.356 m × 0.356 m. Calculate the force exerted on such a window as the plane flies at 7770 meters above the sea level. (Assume the density and pressure of air at 7770 m is 0.562 kg/m3 and 38200 Pa but the interior of the plane remains pressurized to atmospheric pressure, that is, 101325 Pa.)
A typical jet plane travels at 247 m/s at a cruising altitude of 7770 m. The windows on a jet plane measure 0.356 m × 0.356 m. Calculate the force exerted on such a window as the plane flies at 7770 meters above the sea level. (Assume the density and pressure of air at 7770 m is 0.562 kg/m3 and 38200 Pa but the interior of the plane remains pressurized to atmospheric pressure, that is, 101325 Pa.)
1. For the earth, an estimate of the variation of pressure with altitude above the surface of the earth is made for a gas of molecular weight, M, assuming the atmosphere is isothermal, the variation of g with altitude is negligible, and that the atmosphere behaves like an ideal gas. A significant error in this estimate arises from the assumption that the temperature of the atmosphere, T, is isothermal instead of decreasing with altitude. This decrease with altitude y in...
Give that altitude = 5,280 ft temperature = 20C molar weight of air = 28.96 g/mol Calculate the density of air (in kg/m3)
The total wing area of a Boeing B-29 is 1736 ft. The fully loaded take-off mass of a B-29 is 6.25 x 104 kg. The cruising speed of the B-29 is 275 mi/h. At cruising altitude, the air temperature is 251 K and the air pressure is 6.16 x 10Pa. a. Use the density form of the ideal gas law (assuming the average molar mass of the air is 0.0288 kg moll) to compute the air density at cruising altitude...
9 Required information An airplane has a mass of 48,000 kg, a wing area of 340 m*, a maximum lift coefficient of 3.2, and a cruising drag coefficient of O.03 at an altitude of 12.000 m. Take the density of standard air as p1-1225 kg/m3 at sea level and p2 0.312 kg/m at 12,000 m altitude. Determine the safe takeoff speed at sea level, assuming it is 20 percent over the stall speed The safe takeoff speed at sea level...
An Airbus A380-800 passanger airplane is cruising at constant altitude on a straight line with a constant speed. The total surface area of the two wings is 395 m^2. The average speed of the air just below the wings is 248 m/s, and it is 276 m/s just above the surface of the wings. What is the mass of the airplane? The average density of the air around the airplane is ρair = 1.29 kg/m^3.
An airplane is cruising at a density altitude of 38,000 ft at a speed of 500 mph. The ambient temperature is 517 R. A a point on the wing the local velocity is 14% higher than the freestream velocity. What is the pressure coefficient at this point? If the Cp is equal to the average upper surface Cp, and if the upper surface provides three-quarters of the lift, what is the wing lift coefficient? Note that at this Mach number...
problem 40 with parts 40. The atmospheric pressure (force per unit area) on a surface at an altitude z is due to the weight of the column of air situated above the surface. Therefore, the difference in air pressure p between the top and bottom of a cylindrical volume element of height Az and cross-section area A equals the weight of the air enclosed (density ρ times volume V-: ΑΔε times gravity g), per unit area: Let Δ、→0 to derive...
A common belief is that a hole in a jet plane can suck a person out. On an episode of the popular TV series Myth Busters hosts Adam and Jaime attempted to determine whether this is possible. According to the hosts' experiment, such an event cannot happen (that is, they "busted" the myth) But did they need to perform the experiment? As a science adviser to the show, Adam and Jaime ask you to perform a crude calculation to test...