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PHYS1 CH1
measurements
| Question | Answer |
|---|---|
| SI | a set of standards for the fundamental quantities of science |
| SI length | m, meter |
| SI Mass | kg, kilogram |
| SI Time | s, second |
| SI Temperature | K, kelvin |
| SI Electric current | A, ampere |
| SI Luminous intensity | cd, candela |
| SI Amount of substance | mol, mole |
| 10^-1 | d, deci (Powers of Ten) |
| 10^-2 | c, centi (Powers of Ten) |
| 10^-3 | m, milli (Powers of Ten) |
| 10^-6 | m, micro (Powers of Ten) |
| 10^-9 | n, nano (Powers of Ten) |
| 10^-12 | p, pico (Powers of Ten) |
| 10^-15 | f, femto (Powers of Ten) |
| 10^-18 | a, atto (Powers of ten) |
| 10^-21 | z, zepto (Powers of ten) |
| 10^-24 | y, yocto (Powers of ten) |
| 10^3 | k, kilo (Powers of ten) |
| 10^6 | M, mega (Powers of ten) |
| 10^9 | G, giga (Powers of ten) |
| 10^12 | T, tera (Powers of ten) |
| 10^15 | P, peta (Powers of ten) |
| 10^18 | E, exa (Powers of ten) |
| 10^21 | Z, zetta (Powers of ten) |
| 10^24 | Y, yotta (Powers of ten) |
| dimension denotes ____________ | physical nature of quantity |
| Base quantities: [Length]= | L (base quantities) |
| Base quantities: [Mass]= | M (base quantities) |
| Base quantities: [Time]= | T (base quantities) |
| Derived quantities: [A]= | L^2 (area) |
| Derived quantities: [v]= | L/T (speed) |
| In any system of units, the units for some physical quantities must be defined through a measurement process. These are called the ______ _______ for that system. | base quantities |
| All other physical quantities can be expressed as algebraic combinations of the bas quantities are ____ _________. | derived quantity |
| 1 mi = _____ m | 1609 m |
| 1 ft = ______ m | 0.3048 m |
| 1 m= _______ in | 39.37 in |
| 1 m = ______ ft | 3.281 ft |
| 1 in = _________ m | 0.0254 m |
| 1 lb = ________ N | 4.448 N |
| 1 mi/h = __________m/s | 0.447m/s |
| 1 mi/h = __________km/h | 1.61 km/h |
| Accuracy | how close a measurement is to the accepted reference value for that measurement. |
| Precision | how close the agreement is between repeated independent measurements. |
| the accuracy is related to the _____________ from the accepted reference value. | discrepancy |
| the precision of a measuring system is related to the _____________ in the measurements. | uncertainty |
| If the measurements are not very _________, then the uncertainty of the values is high. | uncertainty |
| If the measurements are not very accurate, then the _____________ of the values is high. | discrepancy |
| finding the standard deviation of the measurements is an example of calculating ____________. | uncertainty |
| ___________ is the difference between the measured value and a given standard or expected value. | discrepancy |
| significant figures multiplying rule | final answer = smallest number of significant figures |
| significant figures adding rule | final answer = smallest decimal place |
Created by:
hiroko2021Fall
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