The velocity, relative to a rocket at which exhaust gases leave the nozzle of the rocket’s engine.
The Doppler effect or Doppler shift (or simply Doppler, when in context) is the change in frequency of a wave in relation to an observer who is moving relative to the wave source.
Pressure drop describes the difference in the pressure between two points of a network carrying fluid. Pressure drop occurs when the frictional force caused by the resistance to flow acting on the fluid as it flows through the tube.
The energy which is released while two oppositely charged gaseous ions attract each other and form an ionic solid. The total potential energy of the ionic compounds is also referred to as the lattice energy
It is the measurement of the rigidity of the object and it is obtained by measuring the ratio of shear stress of the object to the shear strain of the object