What was the name of one of the most innovative projects in the post WWII rocketry according to the authors of Atlas (Johnston and Launius)? It introduced a second stage to V-2 rockets and was successfully launched from Cape Canaveral, Florida.

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

Which of the following components of a pid controlled accumulates the error over time and responds to system error after the error has been accumulated? a)- proportional b)- derivative c)- integral d)- on/off.

Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.