Answer: Simulator- A device that enables the operator to reproduce or represent under test conditions phenomena likely to occur in actual performance. Orbit- The curved path of a celestial object or spacecraft around a star, planet, or moon, especially a periodic elliptical revolution. Critical speed- the rotational speed at which acting dynamic forces cause a machine component to vibrate at its natural frequency and can even result in resonant vibrations throughout the entire machine and pump set. Celestial body- An astronomical object or celestial object is a naturally occurring physical entity, association, or structure that exists in the observable universe.
Explanation:
