### motivation | impulse:

Specific impulse
* is expressed in units of seconds
  - limited by the type of reaction mass and the heat the laser brings it to
* measure of the efficiency of rockets and jet engines
  - force based on how much fuel there is
* refers to the units of thrust per units of propellant consumed over time.
  * useful value to compare rocket or jet engines. It is used much like 'miles per gallon' or 'litres per 100 kilometres' is used to compare cars. An engine with a higher specific impulse uses fuel better. This means that the same amount of fuel lets the rocket go faster after all fuel is depleted.
* standard way of measuring the performance of a rocket engine.
  * Be careful not to confuse thrust and specific impulse. Thrust is only the force made by a rocket at one point in time. Specific impulse is a measure of the force based on how much fuel there is.

### motivation:

Incentive
* affect the economic decisions of companies.
* are a cost of doing business
  - actions or rewards that encourage people to act
  - activators that promote rewarding consequences if a target behavior occurs
  - key tools to get people to become stakeholders
* is an external influence, causing certain behavior to take place
  - outward influence which causes certain behavior to take place
  - the perceived value of a outcome, such as improved health status or approval of others
* matter human choice is influenced in a predictable way by changes in economic incentives.
* play a key role in the functioning of a society.

### motivation | incentive:

Dynamic
* are patterns of change that are instances of operation of causal powers
  - ubiquitous in semiconductor manufacturing
* deals with the analysis of bodies in motion and effects of forces upon such bodies.
* defines mass and force and uses Newton s three laws of motion.
* exhibit transient chaos , waves , diffusion , damping , etc.
* is an umbrella term which includes the qualitative factors of movement.
* is concerned with the motion of bodies when there is acceleration
  - velocities and accelerations resulting from the action of forces
  - preserved by keeping jointly the laryngotracheal tract
* is the art of changing the energy level during the song
  - description of why objects move
  - nature of the loudness of an instrument
* is the study of bodies in motion
  - change in the state of something
  - forces and the motion that results
  - moving bodies
  - time-dependent phenomena
  - variations in the forces and motion of objects over large periods of time
* is the way the laws of motion get applied
  - subsystem evolves as time passes
* mathematically describes the motions of bodies under the action of forces.
* refer to the loudness of music.
* refers to explanations of change across time.

### motivation | incentive | dynamic:

Dynamic programming
* general method used for comparing sequences.
* is an important algorithm design technique
  - optimal for nonserial optimization problems
  - the algorithm of basic sequence alignment for optimizing matches
  - used extensively
* is used to compute an optimal alignment of two sequences
  - the costs of the states and the optimal solution
* solves problems by combining the solutions of subproblems.
* technique for efficiently computing recurrences by storing partial results.
* well-known methodology for string comparison.

Fluid dynamic
* business of solving the general equations of motion for fluids.
* describes how liquids and gases move and aims to limit the effects of drag.
* is obvious, as blood a fluid medium flows within a restraint, the blood vessel
  - one of the broadest and most difficult fields of study in all of science
  - the science of motion of anything that flows, liquid or gas
* plays a key role in the anthropogenic and natural processes of the interface.