### resistance:

Abrasion resistance
* is also a good measure of the strength and durability of a fabric
  - resistance afforded by a material to wear by friction
  - the rope's ability to resist fraying
* matter of toughness, rather than hardness.

Active resistance
* involves using physical force to repel the attacker.
* is the opposite of passive resistance, and is more violent.

### resistance:

Air resistance
* Most air resistance depends on shapes
  - dissipates energy
  - has motion
* Some air resistance causes energy
  - kinetic energy
  - opposes upward motion
* affects terminal velocity within Earth's atmosphere
  - the motion of a real fly line considerably
* alters motion.
* can vaporize meteors.
* caused by friction is also a friend to falling cats.
* decreases the velocity of a moving object.
  - primarily on the size and speed of a falling object
* force caused by a gas rubbing against the surface of a material.
  - no effect on the gravitational attraction between objects
* increases exponentially with speed
  - with increasing speed
* involves movement.
* is another form of friction, but it has some interesting properties
  - due to the colliding of an object with molecules of air
  - simply a force, and force is simply change of momentum
* is the bane of a cyclist's life
  - result of collisions of the object's leading surface with air molecules
  - very important for the flight of a golf ball on earth, in contrast to on the moon
  - zero at zero velocity
* keeps a piece of paper, for example, from falling at the same rate.
* prevents the sheet of paper from falling at the same rate.
* slows small things a lot more than big things
  - the speed of a bullet and reduces the distance by which it travels
* tends to be proportional to speed.

### resistance:

Antibiotic resistance
* All antibiotic resistance has a genetic basis.
* becomes problems.
* can be the result of different things
  - either be inherent or acquired
  - move from plant diseases to human ones
* classic demonstration of natural selection.
* continues to be a major public health concern.
* demands replacements for old antibacterials.
* falls in Finland A Finnish effort to limit bacterial resistance bears fruit
* genetic phenomenon.
* growing problem for patients around the world
  - in hospitals
  - public health problem
* is also a concern
  - an example of change brought about by human interference
  - both a problem of animal agriculture and human health
  - due to another gene in the plasmid
  - evidence of evolution because the organisms changed over time
  - generally low amongst feline staphylococci
  - linked to a genetic marker that can be transferred to other bacteria
  - now a major public health issue
  - of concern to human and animal practitioners
  - particularly dangerous for children, but it can occur in adults, as well
  - progressive, evolving from low levels through intermediate to high levels
  - spread by the bacteria themselves
* major European and global health problem.
* poses a dire threat in hospitals and communities.
* results from the natural selection of stronger bacteria over weaker ones.
* serious health care problem related to the widespread use of antibiotics
  - threat to human health, and new antibiotics are urgently needed
* spreads fast but efforts are being made to slow it
  - quickly
* worrying component of the mechanisms of emerging infectious diseases.

Bacterial resistance
* can sometimes occur by chance.
* is less likely with benzoyl peroxide than with topical antibiotics.
* makes an infection much harder to treat.

Chemical resistance
* ensures durability
  - their extremely long lifecycle
* is excellent against most acids and bases
  - solvents and fuels
  - good, except to strong acids and alkalies
* protects the resin from breakdown due to exposure to environmental chemicals.
* varies between different coatings.