Term
| what is the full SI system name? |
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Definition
| le system international d'unites |
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Term
| what are the 7 SI base units |
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Definition
length m
mass kg
electric current A
time S
luminosity Cd
temp C
amount mols |
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Term
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Definition
mutually independent
can be gathered by direct measurement |
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Term
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Definition
are in terms of base units
cannot be measured directly |
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Term
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Definition
force (N) kg.m/s^2
velocity (m/s^2)
area m^2
power (Watts) m^2. kg/s^3 |
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Term
| what are deviations from true values called? |
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Definition
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Term
| what are main sources of error |
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Definition
sensitivity of instruments
experimental design |
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Term
| define a random error, it's frequency, and some of it's sources. also state how to fix it |
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Definition
random error is an error that is always there.
because of operator, change in conditions
take lots of trials |
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Term
| define a systematic error, it's frequency, and some of it's sources. also state how to fix it |
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Definition
systematic errors are typically there.
they are caused by faulty calibration and techniques and instruments
calibrate, fix your tequnique. |
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Term
| what is precision and accuracy limited by? |
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Definition
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Term
| define percision and accuracy |
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Definition
precision- how reproducible the result is
accuracy- how close to the true number it is. |
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Term
| in general how do you deal with errors |
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Definition
identify them
identify the magnitude
reduce them.. with stats |
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