Description : What was the main disadvantage of vacuum tubes? A) They were larger in size B) They consumed a lot of electricity C) They produced heat and often burned out D) The operation cost was high
Last Answer : Answer : C
Description : Aerospace engineers, how long would a commercial passenger aeroplane last in the vacuum of space, before it starts leaking atmosphere?
Last Answer : answer:I'm not a structural guy . Maybe someone can answer that part of your question. I can however answer about over design. We make an engine critical part that is exposed to an operating ... for that altitude craft could survive in outer space since that would be only about 33% more stress.
Description : How does rocket thrust work in the vacuum of space?
Last Answer : answer:Lets say that you are floating out in space while holding a bowling ball. If you push the ball away from you then you and the ball will be put into motion in opposite directions. The same ... fires up, it pushed the blast in one direction as the rocket is pushed in the opposite direction.
Description : Vacuum is generally maintained in the vapour space of an evaporator mainly to (A) Get economical temperature difference by using moderate pressure steam (B) Facilitate forward ... (C) Concentrate heat sensitive materials (D) Achieve very high concentration of the final product
Last Answer : (A) Get economical temperature difference by using moderate pressure steam
Description : No liquid can exist as liquid at (a) – 273 °K (b) vacuum (c) zero pressure (d) centre of earth (e) in space.
Last Answer : Answer : c