Entrance of space module into atmosphere is one of the very critical phases of any space mission. Due to formation of bow shock (Detached) in front of the module, the air temperature drastically increases to thousands of Kelvin. One, suggested in order to find the amount of heat transfer to the space module at the reentry phase, we can setup an experiment on the ground with a scaled model in the wind tunnel. The proposed scaled model is . / times and is located in a wind tunnel with a maximum air velocity 100 times less than actual velocity of the module. The density of the air at the reentry zone is almost 1000 times less than air density at the sea level, where the wind turbine is located. The see level air Prandtl number is approximately the same as reentry zone. But the dynamic viscosity of air at the reentry condition is almost 3.59 times of the sea level air viscosity. The Thermal conductivity of air in the reentry condition is 4.356 times of the sea level condition. Apollo 9 re-entry vehicle at San Diego Air and Space Museum. In the wind tunnel for the air temperature difference of 100o C between air and the scaled model the energy transfer due to the heat was measured to be about 400W. At the reentry condition with 1500o C Temperature how much is the energy transfer due to the heat to the module

Arotating space station is said to create “artificial gravity”—a loosely-defined term used for an acceleration that would be crudely similar to gravity. the outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength more naturally than in non-rotating space environments. if the space station is 200 m in diameter, what angular velocity would produce an “artificial gravity” of 9.80 m/s^{2} 2 at the rim?

Aplane flies a distance d from west to east at a constant speed vp , with respect to the air in a time twe . on the return trip, the plane flies a distance d from east to west at a constant speed vp , with respect to the air in a time tew . on both trips the wind blows from west to east at a constant speed va , with respect to the ground 1) what is tew in terms of vp, va, and d, as needed? tew=dvp tew=dvp+va tew=dva tew=dvpâ’va tew=12dvp tew=12dvp+va tew=12dvpâ’va your submissions: b submitted: saturday, january 26 at 6: 49 pm feedback: feedback will be given once all questions have been attempted and the grade cluster button has been pressed. 2) what is twe in terms of vp, va, and d, as needed? twe=dvp twe=dvp+va twe=dva twe=dvpâ’va twe=12dvp twe=12dvp+va twe=12dvpâ’va your submissions: d submitted: saturday, january 26 at 6: 49 pm feedback: feedback will be given once all questions have been attempted and the grade cluster button has been pressed. 3) assuming d = 2300 miles, vp = 400 miles/hr, and twe = 4 hours, what is va, the speed of the wind with respect to the ground? va = 100 miles/hr va = 575 miles/hr va = 200 miles/hr va = 175 miles/hr va = 975 miles/hr 4) once again, assuming d = 2300 miles, vp = 400 miles/hr, and twe = 4 hours, what is tew, the time it takes the plane to fly a distance d miles from east to west? tew = 5.75 hours tew = 11.5 hours tew = 7.67 hours tew = 8 hours tew = 10.2 hours

Amira pulls a 3 pound wagon 4 feet. how much work has she done?