### force:

Torque
* Most torque causes motion
  - rotational motion
  - is exerted by gravity
* Some torque is generated by external fields
  - magnetic fields
* are what create spin, and repeated torques are what created rapid rotation.
* arises from an applied force on an object.
* cause angular accelerations.
  - software
* produces rotation.

### force | torque:

Magnetic moment
* is torque
* provide indirect but very powerful information about particle structure.

### force | torque:

Uneven torque
* can cause cracking
  - change the speed of rotation
+ Flywheel: Energy :: Engineering
  * A 'flywheel' is a heavy disk or wheel that is attached to a rotating shaft. Flywheels are used for storage of kinetic energy. The momentum of the flywheel causes it to not change its rotational speed easily. Because of this, flywheels help to keep the shaft rotating at the same speed. This helps when the torque applied to the shaft changes often. Uneven torque can change the speed of rotation. Because the flywheel resists changes in speed, it decreases the effects of uneven torque. Engines which use pistons to provide power usually have uneven torque and use flywheels to fix this problem.

Unbalanced force
* acting through a distance does exist in radiant space.
* cause accelerations
  - changes in velocity
* produce acceleration.

Upward force
* Most upward forces come from gas pressure
* Most upward forces have same size
* Some upward forces accompany hurricanes
  - are exerted by fluid

Vertical force
* Most vertical forces cause displacement
  - horizontal displacement
* Some vertical forces accompany hurricanes.
* acting on the hammock is the weight of the person.
* affect vertical motion.

Viscous force
* act on the small scales and determine the size of smallest eddies.
* are referred to as drag.

### foreign policy:

Isolationism
* are foreign policy.
* is foreign policy

### forensic specialists:

Forensic psychiatrist
* are forensic specialists
  - psychiatrists
* face risks unique to their subspecialty.

### forest fire:

Crown fire
* Crown Fires can kill either pineland or hammock plants.
* Some crown fire affects abundances.
* Some crown fire kills colorado pinyons
  - trees
* are the most dangerous and destructive class of wildland fire.
* burn across tree tops which are also known as the canopy or crown
  - through the tops of trees
  - with huge flames and has intense heat and power
* extend from tree tops to ground surface and re- move most of the vegetation.
* is forest fire.
* occur during the phase of highest fire intensity
  - on sites with high fuel loads
* spread quickly and are much more destructive than surface fires
  - rapidly by wind and move quickly by jumping along the tops of trees
* tend to lead to dominance by jack pine on poor soils and aspen on good soils.

### forest protection:

Planting tree
* are forest protection
  - hard work
  - planting
* begins the process of biodiversity recovery, with wildlife completing the process.
* can give a landowner an investment for their future or the future of their children.
* creates privacy and makes neighbourhoods look well established.
* has a variety of benefits for people and animals.
* incorporates both individual and community involvement in preserving our environment.
* is about making love with the Earth
  - an act of kindness and optimism
  - highly advisable to help reduce carbon dioxide levels
  - known as afforestation, cutting the trees is deforestation
  - the best way to bring home fall color, and fall is the best time to plant trees
* practical way everyone can make a difference.
* provides benefits both to individuals and to society.
* saves energy and money.
* simple, inexpensive way to assure Earth's health and future generations.

### foresters:

Forest ranger
* are foresters.
* teach people how to protect the forest.