2 Flashcards

1
Q

storhet

A

allt mätbart

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2
Q

enhet

A

det storheten jämförs med

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3
Q

SI-systemet

A

7 grundenheter, härledda enheter, tilläggsenheter, supplementenheter, prefix

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4
Q

härledd enhet

A

enhet som bildats av andra enheter, ex. m/s

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5
Q

prefix

A

förstavelse som ändrar storleken på en enhet, ex. kilo i kilogram

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6
Q

storleksordning

A

avrunda till 10^n, ex. människans längd, storleksordning 1 m, (0.5-5m)

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7
Q

grundenhet för massa

A

kg

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8
Q

tiopotenser

A

taldel mellan 1-10, grundenhet + tiopotens eller taldel mellan 1-1000 med enhet + prefix utan tiopotens

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9
Q

avrundning

A

gällande siffror, samma som minst noggranna utgångsvärdet

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10
Q

slumpmässiga fel

A

minska genom upprepning

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11
Q

systematiska fel

A

ex. felkalibrerad våg, minska genom bättre metoder, ingen är fullkomlig

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12
Q

resultatet 64+-1.6 kg betyder att…

A

medelvärdet 64kg, absolut fel 1.6kg, rätt värde 42.4-65.6 kg, relativa fel 2.5%

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