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CC-2426 Physics Content > Quantities,units,vectors,scalars,practical skills > Flashcards

Quantities,units,vectors,scalars,practical skills Flashcards

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1
Q

What are the seven quantities fundamental to physics..

A

mass
length
time
temperature
current
amount of substance
luminous intensity

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2
Q

What are the base quantities

A
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3
Q

What are the derived units

A
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4
Q

What are the standard prefixes

A
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5
Q

What are vectors

A

Physical quantities that have magnitude and direction

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6
Q

What are scalars

A

Physical quantities that only have magnitude

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7
Q

What is displacement

A

The overall distance travelled from the starting position

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8
Q

When adding scalars…

A

normal arithmetic is applied

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9
Q

What is the formula to work out the horizontal component

A

Fh=Fcosθ

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10
Q

What is the formula to work out the vertical component

A

Fv=Fsinθ

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11
Q

What is an Error

A

The difference between a measured result and the true value

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12
Q

An error can be due to…

A

Random or systematic

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13
Q

What is precision

A

the consistency between values obtained by repeated measurements

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14
Q

What is accuracy

A

How close the measured value is to the true value

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15
Q

What is the formula to work out percentage uncertainty for 1 value

A

(absolute uncertainty/value) * 100

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16
Q

What is the formula to work out the absolute uncertainty for repeated values

A

Range/2

17
Q

What is the formula to work out the percentage uncertainty for repeated values

A

(absolute uncertainty/mean value) * 100

18
Q

If quantities are added or subtracted then___

A

add the absolute uncertainties of each quantity

19
Q

If quantities are multiplied or divided then___

A

add the percentage uncertainties of each quantity

20
Q

If a quantity is raised to a power then___

A

multiply the percentage uncertainty by the power

21
Q

What is the formula to work out the absolute uncertainty for 1 value

A

absolute uncertainty=resolution

22
Q

What is a reading

A

A value found from a single judgement

23
Q

What is a measurement

A

Requires the value to be taken from two readings or judgements

CC-2426 Physics Content (3 decks)

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