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Physics > Physical Quantities > Flashcards

Physical Quantities Flashcards

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1
Q

what are the basic quantities?

A

-length
-current
-mass
-time
-temperature
LCMTT

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2
Q

what is the si unit of length?

A

metre (m)

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3
Q

what is the si unit of current?

A

ampere (A)

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4
Q

what is the si unit of mass?

A

kilogram (kg)

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5
Q

what is the si unit of time?

A

seconds (s)

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6
Q

what is the si unit of temperature?

A

kelvin (k)

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7
Q

what are some examples of derived quantities?

A
  • density
  • volume
  • speed
  • force
  • pressure
  • electrical energy
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8
Q

what is the symbol and factor of the prefix mili?

A

symbol - m

factor - x10-3

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9
Q

what is the symbol and factor of the prefix micro?

A

symbol - upside down h

factor - x10-6

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10
Q

what is the symbol and factor of the prefix nano?

A

symbol - n

factor - x10-9

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11
Q

what is the symbol and factor of the prefix pico?

A

symbol - p

factor - x10-12

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12
Q

what is the symbol and factor of the prefix kilo?

A

symbol - k

factor - x10 3

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13
Q

what is the symbol and factor of the prefix mega?

A

symbol - M

factor - x10 6

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14
Q

what is the symbol and factor of the prefix giga?

A

symbol - G

factor - x10 9

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15
Q

what is the symbol and factor of the prefix tera?

A

symbol - T

factor - x10 12

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16
Q

what can vernier caliper be used for?

A

to measure external and internal diameter as well as depth

17
Q

what is the micrometer screw gauge used for?

A

to measure the thickness of a coin or diameter of wire

18
Q

what is a period?

A

it is the time taken for one complete oscillation

19
Q

what is the si unit for period?

A

seconds (s)

20
Q

how does the length of the string affect the period?

A

the longer the string, the longer the period

the shorter the string, the shorter the period

21
Q

does the mass of the bob affect the period?

A

no, the mass of the bob does not affect the period

22
Q

what are some precautions for the pendulum experiment?

A
  • start timing when oscillations are stable
  • use small angle of displacement
  • repeat the experiment at least once and use the average time to calculate period of oscillation
  • use the retort stand as an aid of fudicial line to ensure stopwatch is start and stop accurately at the right position
23
Q

define scalar quantities

A

a scalar quantity has only magnitude but no direction

24
Q

define vector quantities

A

a vector quantity has both magnitude and direction

25
Q

what is the approximate size of an atom?

A

1x10 -10m

26
Q

what is the approximate size of the earth?

A

6371km in radius, about 1x10 7m in size

Physics (3 decks)

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