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Physics > Physical Quantities, Units& Measurements > Flashcards

Physical Quantities, Units& Measurements Flashcards

0
Q

What does a physical quantity consists of?

A

A numerical magnitude and a unit.

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1
Q

What is a physical quantity?

A

A quantity that can be measured.

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2
Q

What is the name and symbol of unit for the base quantity length?

A

Metre, m.

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3
Q

What is the name and symbol of unit for the base quantity mass?

A

kilogram, kg.

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4
Q

What is the name and symbol of unit for the base quantity time?

A

Second,s.

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5
Q

What is the name and symbol of unit for the base quantity electric current?

A

Ampere, A.

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6
Q

What is the name and symbol of unit for the base quantity temperature?

A

kelvin,K.

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7
Q

What is the name and symbol of unit for the base quantity amount of substance?

A

Mole,mol.

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8
Q

What is the name and symbol of unit for the base quantity luminous intensity?

A

Candela,cd.

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9
Q

What is the formula for finding area?

A

Length X width.

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10
Q

What is the formula for finding volume?

A

Length X width X height.

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11
Q

What is the formula for finding density?

A

Mass/Volume.

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12
Q

What is the formula for finding speed?

A

Distance/Time.

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13
Q

What is the formula for finding acceleration?

A

Change in velocity/Time.

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14
Q

What is the formula for finding force?

A

Mass X acceleration.

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15
Q

What is the formula for finding pressure?

A

Force/Area.

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16
Q

What is the formula for finding work?

A

Force X Distance.

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17
Q

What is the formula for finding power?

A

Work/Time.

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18
Q

What is the symbol and power of the prefix pico?

A

p, 10 -12

19
Q

What is the symbol and power of the prefix nano?

A

n, 10 -9

20
Q

What is the symbol and power of the prefix micro?

A

u, 10 -6

21
Q

What is the symbol and power of the prefix milli?

A

m, 10-3

22
Q

What is the symbol and power of the prefix centi?

A

c,10-2

23
Q

What is the symbol and power of the prefix deci?

A

d,10-1

24
Q

What is the symbol and power of the prefix kilo?

A

k,10 3

25
Q

What is the symbol and power of the prefix mega?

A

M, 10 6.

26
Q

What is the symbol and power of the prefix giga?

A

G,10 9.

27
Q

What is the symbol and power of the prefix Tera?

A

T, 10 12.

28
Q

What is a scalar and name a few examples.

A
  1. Physical quantity that only has magnitude.

2. Mass,time, length, energy, density.

29
Q

What is a vector and name a few examples.

A
  1. Physical quantity that has both magnitude and direction.

2. Displacement, velocity, force and momentum.

30
Q

What is the S1 unit for length?

A

metre, m.

31
Q

Which errors should we avoid when using the metre ruler?

A
  1. Parallex error

2. End error.

32
Q

How do we avoid the parallax error?

A

Line of vision should be perpendicular to the scale.

33
Q

What is the function of the inside jaws of the vernier calipers?

A

Measuring internal diameter or length.

34
Q

What is the function of the outside jaws of a vernier caliper?

A

Measuring external diameter or length.

35
Q

What is the tail of a vernier caliper for?

A

Measuring length.

36
Q

What is the range of measurement and precision of a measuring tape?

A

Range: 0-5m
Precision: 0.1cm

37
Q

What is the range of measurement and precision of a meter ruler?

A

Range:0-1m
Precision: 0.1cm

38
Q

What is the range of measurement and precision of a vernier caliper?

A

Range:0-15cm
Precision: 0.01cm

39
Q

What is the range of measurement and precision of a micrometer screw gauge?

A

Range: 0-2.5cm
Precision: 0.01mm

40
Q

Each division on a micrometer screw gauge represents what distance?

A

0.50mm/50 = 0.01mm.

41
Q

What are some precautions we have to take when using the micrometer screw gauge?

A
  1. Thimble not tightened too much.
  2. Clean ends of anvil and spindle.
  3. Check for systematic error.
42
Q

What is zero error caused by?

A

Due to instruments that do not read exactly 0 when there is nothing being measured.

43
Q

What is used to measure an internal of time?

A

Stopwatch.

44
Q

The period T of a pendulum is independent of?

A
  1. Amplitude of oscillation

2. Mass of bob

45
Q

What is an oscillation?

A

Time for one complete swing(Time where bob passes through middle the second time) of a pendulum

Physics (9 decks)

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