Test 1 - Ch 18

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Anonymous
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221212
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Test 1 - Ch 18
Updated:
2013-05-26 15:48:21
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biomechanics computer technology
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biomechanics and computer technology
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  1. study of motion and objects
    mechanics
  2. complex study of matter, time, energy, force, and space
    physics
  3. primary unit that makes up all physical matter
    atom
  4. particles smaller than atoms
    subatomic particles
  5. name some subatomic particles
    • protons
    • neutrons
    • electrons
  6. average diameter of an atom
    10-8 cm
  7. 2 main particles within the nucleus
    • neutron
    • proton
  8. has positive electrical charge and is heaviest of subatomic particles
    proton
  9. has neutral charge
    neutron
  10. has negative charge and orbits the nucleus in discrete, 3-dimensional energy levels
    electron
  11. pure substance in which each atom has same number of protons
    element
  12. number of protons in atom
    atomic number
  13. sum of the weight of atom's protons and neutrons
    atomic weight
  14. atom with correct number of electrons and protons, but different number of neutrons
    isotope
  15. two or more atoms held together by chemical bonds
    molecule
  16. compounds in which one of the molecules contains the element carbon
    organic compounds
  17. substance in which molecules are tightly bound in rigid formation
    solid
  18. formed when heat is applied to a solid
    liquid
  19. point at which a substance turns from solid to liquid
    melting point
  20. when does a substance assume a gaseous state?
    when the energy applied to it is greater than the energy bonds that hold the molecules together
  21. temp of a substance when its state changes from liquid to gas
    boiling point
  22. result of energy and work
    motion
  23. stationary object will remain stationary, and one that is moving will keep moving until a force acts upon it
    Newton's first law
  24. as an object falls, acceleration increases as the weight of the object increases
    Newton's second law
  25. amount of force needed to push an object equals the force needed to resist movement in the pushed object
    Newton's third law
  26. elements of motion
    • speed
    • distance and displacement
    • velocity
    • momentum
    • force
    • vector
  27. amount and weight of matter
    mass
  28. equation for momentum
    mass x velocity
  29. distance around a circle
    circumference
  30. path of an object in motion in which gravity acts to pull the object downward
    projectile motion
  31. also referred to as stored energy
    potential energy

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