Chap 1: Physical Quantities, Units & Measurements Flashcards

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1
Q

Give examples of base quanities

A

mass, length, time, current, temperature, amount of substance

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2
Q

SI unit of mass

A

kg (kilogram)

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3
Q

SI unit of length

A

m (metre)

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4
Q

SI unit of time

A

s (second)

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5
Q

SI unit of current

A

A (ampere)

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6
Q

SI unit of temperature

A

K (kelvin)

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7
Q

SI unit of amount of substance

A

mol (mole)

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8
Q

‘formula’ of standard form

A

a x 10^b, where 1 </= a < 10

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9
Q

precision of metre rule

A

0.1cm/1mm [up to 1m]

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10
Q

precision of measuring tape

A

0.1cm/1mm [up to several m]

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11
Q

precision of vernier calipers

A

0.01cm/0.1mm [up to 15cm]

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12
Q

precision of digital calipers

A

0.001cm/0.01mm [up to 15cm]

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13
Q

precision of micrometer screw gauge

A

0.001cm/0.01mm [up to 2.5cm]

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14
Q

precision of digital micrometer screw gauge

A

0.0001cm/0.001mm [up to 2.5cm]

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15
Q

Factor for tera (T)

A

10^12

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16
Q

Factor for giga (G)

A

10^9

17
Q

Factor for mega (M)

A

10^6

18
Q

Factor for kilo (k)

A

10^3

19
Q

Factor for deci (d)

A

10^-1

20
Q

Factor for centi (c)

A

10^-2

21
Q

Factor for milli (m)

A

10^-3

22
Q

Factor for micro (μ)

A

10^-6

23
Q

Factor for nano (n)

A

10^-9

24
Q

What is considered as a full oscillation (period)?

A

X to Y to Z to Y back to X
[X to Z to X]

25
Q

Define scalar

A

Physical quantity with only magnitude

26
Q

Define vector

A

Physical quantity with magnitude and direction

27
Q

Give examples of scalar quantities

A

distance, speed, mass, energy, time

28
Q

Give examples of vector quanities

A

displacement, velocity, acceleration, force, weight

29
Q

Define distance

A

total length covered regardless of direction

30
Q

Define displacement

A

distance measured in a straight line in a specific direction

31
Q

Give formula for velocity

A

rate of change of displacement (m/s)
[displacement/time taken]

32
Q

Give the formula for speed

A

distance per unit time (m/s)
[distance/time taken]

33
Q

Symbol for resultant force

A

FR