Design a solid or hybrid upper stage propulsion module (pm) with the capability to boost a 181 kg payload from a 352 km circular orbit to a 704 km circular orbit. of the 181 kg payload, 125 kg is allocated for the experimental satellite, leaving no more than 56 kg for the pm. show your design’s a) throat area b) exit area c) exhaust velocity d) mass flow rate state any assumptions that you make. hint, it takes 0.52 m/s to raise the orbit 1 km at an altitude of 352 km.

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

Modern high speed trains do not have perpendicular expansion gaps where rails are joined end-to-end any more they are mostly welded together but what might happen if there was a spell of particularly hot weather that causes inspection of the tracks?

What is the major difference between thermoplastics and thermosetting plastics from the polymerization structure point of view?