On the principle of which of the following does the engine of a jet plane work?

Options :
  1. mass
  2. linear momentum
  3. energy
  4. angular momentum
Answer and Explanation :-

Answer: Option 2

Explanation:

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It isn't as bad as you sometimes think it is. It all works out. Don't worry. I say that to myself every morning. It all works out in the end. Put your trust in God, and move forward with faith and confidence in the future. The Lord will not forsake us. He will not forsake us. If we will put our trust in Him, if we will pray to Him, if we will live worthy of His blessings, He will hear our prayers.
-Gordon B. Hinckley