PHYSICS Q's

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shelleye1
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26352
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PHYSICS Q's
Updated:
2010-07-15 14:56:37
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phys
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physics
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  1. How do you determine the force on a particle in an electric field?
    Force=charge of the particle x the magnitude of the field F=qE
  2. Fastest evaporating substance has the __________ vapor pressure
    highest
  3. Sound travels fastest through
    solids fastest, liquids and then air slowest
  4. how are frequency and period related?
    • Period= 1/frequency
    • they are inversely related
  5. Sound travels faster in _____ temps
    high
  6. What is the formula for the work done if you lift a mass from a to b?
    W=mg(change in height)
  7. Galvanic cells....
    always have a positive standard EMF (electron motive force)
  8. Rapid processes are often adiabatic. Adiabatic means....
    no heat is exchanged
  9. If an ion has 6 ligands attached to a metal, it is said to be..... in shape
    octahedral
  10. Lewis acids....
    accept electron pairs
  11. Bronsted bases
    take a hydrogen proton
  12. ______ occurs at the cathode
    reduction (i.e. Al(3+) becomes Al
  13. the focal length of a sperical mirror is what?
    the focal length of a spherical mirror is one halth the radius of the curvature
  14. snells law says what
    na sin θa = nl sin θl the index of refraction of two substances are related by the sin angle of the normal
  15. the magnitude of an electic field on a point charge formula
    E = (kq)/r2
  16. atomic number
    number of protons in a nucleus
  17. What do standard reduction potentials show? (i.e. a large, positive)
    • a LARGE POSITIVE STANDARD REDUCTION POTENTIAL means that the thing will be REDUCED MORE EASILY
    • so if the thing with the larger potential GAINS ELECTRONS in the reaction, that is more favorable
  18. The ANODE is the site of ___________
    OXIDATION
  19. in a cell, current flows toward the
    negative end
  20. in a galvanic cell, electrons (not current) flow toward the
    positive end (current flows to the negative end)
  21. adiabatic
    Adiabatic heating or cooling of a gas results from pressure change. Work is done on or by the gas, but there is no heat transfer with the environment.
  22. Adding resistors in parallel...____________. the overall resistance of the circuit
    decreases
  23. under alpha decay the daughter nucleus....
    has 2 fewer protons and two fewer neutrons
  24. what is the volume of one mol of ideal gas?
    22.4 liters
  25. In an electrolytic battery the anode is _____
    positive and the cathode is negative
  26. somatostatin
    a pancreatic enzyme that is made when there is alot of glucose in the blood and it makes the levels of both insulin and glucagon go down

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