### rate | speed:

Angular velocity
* Angular velocities are speed.
* combination of angular speed and the direction of the rotation.
* is basically how fast an object spins around a pivotal point
  - important to the microgravity people
  - measured in units of cycles per second
* varies inside the Sun in a complicated fashion.

### rate | speed:

Average speed
* declines with increasing atomic mass.
* describes the speed over some time period.
* equals distance traveled divided by elapsed time.
* is described as a measure of distance divided by time
  - distance over time
* is the magnitude of A. acceleration
  - rate of change of distance with time
* is the total distance traveled divided by the total time elapsed
  - travelled divided by the total time taken for the trip
  - what cycle computers calculate based on the total time the bike is moving
* refers to speed while riding and is independent of the length of the ride.

Clock speed
* is an unreliable benchmark of computer performance
  - measured in megahertz
* is one key factor in microprocessor performance
  - of the main factors that determine the computing power of a computer
  - the maximum rate that the chip can be clocked
  - to a computer as horse power is to the engine of car
  - very important in terms of bandwidth, and latencies and bandwidth go hand in hand

Digital speed
* is all about information.
* shrinks the distance between the information and the decision.

Download speed
* is the most important aspect of web design.
* major factor in end user satisfaction with a given web site.

Excessive speed
* can contribute to a rollover and increase the severity of a rollover crash
  - lead to accidents
* creates heat buildup in a tire, leading to possible tire failure.
* factor in many accidents.
* is the major cause of damage to ships by ice
  - number one cause of fatal crashes involving teen drivers

Film speed
* determines how much light is required for correct exposure of the photographic emulsion.
* indicates sensitivity to light.
* is the level of sensitivity that the film has to light
  - sensitivity of a film to light
* measure of how quickly light imprints on the image.
* measurement that indicates a film's sensitivity to light.
* number that indicates the film's sensitivity to light.
* refers to how light sensitive it is
  - the sensitivity to light for a certain film

Ground speed
* is the speed which the craft is actually moving ouer the ground
  - what determines separation across the ground
* means nothing without air speed.
* result of airspeed and wind speed.

### rate | speed:

High speed
* create more heat for tires and the engine.
* dives enable Peregrines catch everything from songbirds to herons and ducks.
* driving with under inflated tires can lead to tread separation.
* generate high frequency vibrations.
* imaging technology allows one to capture fast motion.
* increase both tire force and bouncing
  - the risk of fatal crashes, especially for pedestrians
* is one of the major causes of fatal tractor accidents occurring on public roads
  - the leading cause of accidents
  - used during manual trim, and low speed during automatic trim
* reduce total traffic capacity due to the increased distance required between vehicles.

Higher speed
* lead to increasing turbulence and much stronger increase of air resistance with speed.
* reduce the ability of vehicles and restraint systems to protect occupants.

Idle speed
* is the slowest speed at which a vessel can maintain steerage
  - needed to maintain steerage or maneuverability
* means the lowest speed at which a vessel can operate and maintain steering control.

Instantaneous speed
* describes the speed at any instant.
* is the first derivative of distance with respect to time
  - velocity magnitude at a particular time