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Online Physical Science > Counting Significant Figures > Flashcards

Counting Significant Figures Flashcards

1
Q

284

has how many significant figures?

A

284

Has 3 sig figs

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2
Q

28.5

has how many significant figures?

A

28.5

Has 3 sig figs

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3
Q

1.20

has how many significant figures?

A

1.20

Has 3 sig figs

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4
Q

0.719

has how many significant figures?

A

0.719

Has 3 sig figs

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5
Q

What is the “Mantissa” of this number?

A

1.25

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6
Q

0.0004

has how many significant figures?

A

0.0004

Has 1 sig fig

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7
Q

0.00090

has how many significant figures?

A

0.00090

Has 2 sig figs

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8
Q

770

has how many significant figures?

A

770

Has 2 sig figs

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9
Q

930,020

Which digit above is the uncertain digit?

A

930,020

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10
Q

0.73666

has how many significant figures?

A

0.73666

Has 5 sig figs

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11
Q

What is the exponent of this number?

A

The 3 (or the 103)

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12
Q

670.45

Which digit above is the uncertain digit?

A

670.45

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13
Q

80000

has how many significant figures?

A

80000

Has 1 sig fig

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14
Q

What is meant by the words

“The Uncertain Digit?”

A

The “Uncertain Digit” is usually the farthest digit on the right.

  1. 2
  2. 770

574

92.000

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15
Q

3000

has how many significant figures?

A

3000

Has 1 sig fig

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16
Q

12

has how many significant figures?

A

12

Has 2 sig figs

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17
Q

What is the “Mantissa” of this number?

A

1.38502

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18
Q

.0080

Which digit above is the uncertain digit?

A

.0080

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19
Q

600783

has how many significant figures?

A

600783

Has 6 sig figs

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20
Q

559.832

has how many significant figures?

A

559.832

Has 6 sig figs

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21
Q

What is the “Big Digit?”

A

The “Big Digit” is the farthest left, non-zero, digit in a number.

250.9

30337

0.000344

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22
Q

1.003

has how many significant figures?

A

1.003

Has 4 sig figs

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23
Q

49.924

has how many significant figures?

A

49.924

Has 5 sig figs

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24
Q

What is the exponent of this number?

A

-1 (or the 10-1)

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25
Q

37.003

has how many significant figures?

A

37.003

Has 5 sig figs

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26
Q

1234500

has how many significant figures?

A

1234500

Has 5 sig figs

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27
Q

0.012345

has how many significant figures?

A

0.012345

Has 5 sig figs

28
Q

37982

has how many significant figures?

A

37982

Has 5 sig figs

29
Q

If a number has a

zero with a line over it…

Where is the uncertain digit?

(This is an important exception to some other rules you might see on these flash cards.

A

The zero with the line over it is the uncertain digit.

30
Q

0.0442

has how many significant figures?

A

0.0442

Has 3 sig figs

31
Q

When a scientist writes down a number how many “uncertain digits” do they typically keep.

A

One

This will usually be the last digit on the right.

454.07

32
Q

20

has how many significant figures?

A

20

Has 1 sig fig

33
Q

55

has how many significant figures?

A

55

Has 2 sig figs

34
Q

0.033

has how many significant figures?

A

0.033

Has 2 sig figs

35
Q

2000

Which digit above is the uncertain digit?

36
Q

37.07

has how many significant figures?

A

37.07

Has 4 sig figs

37
Q

3.96

has how many significant figures?

A

3.96

Has 3 sig figs

38
Q

0.0308

has how many significant figures?

A

0.0308

Has 3 sig figs

39
Q

When we ask

“How many digits wide is a number?”

What do we mean?

A

We mean

how many digits from the Big Digit to the Uncertain Digit.

  • This number is 5 digits wide:*
    603. 04
40
Q

You pick 3 tennis balls out of a bin. What is the uncertainty associated with the number 3 in this case.

A

There is no uncertainty.

You can be sure you have “EXACTLY” 3 tennis balls.

You counted to 3, you did not “measure” 3 tennis balls.

41
Q

0.0020

has how many significant figures?

A

0.0020

Has 2 sig figs

42
Q

25000

has how many significant figures?

A

25000

Has 2 sig figs

43
Q

30

has how many significant figures?

A

30

Has 1 sig fig

44
Q

930

has how many significant figures?

A

930

Has 2 sig figs

45
Q

400

has how many significant figures?

A

400

Has 1 sig fig

46
Q

.008

Which digit above is the uncertain digit?

47
Q

20.05

has how many significant figures?

A

20.05

Has 4 sig figs

48
Q

1234567

has how many significant figures?

A

1234567

Has 7 sig figs

49
Q

800.0008

has how many significant figures?

A

800.0008

Has 7 sig figs

50
Q

1.6

has how many significant figures?

A

1.6

Has 2 sig figs

51
Q

156

has how many significant figures?

A

156

Has 3 sig figs

52
Q

An “EXACT NUMBER” has how many sig figs?

A

Unlimited

An exact number is not a measurement, thus, it has no uncertainty.

53
Q

6

has how many significant figures?

A

6

Has 1 sig fig

54
Q

9.82

has how many significant figures?

A

9.82

Has 3 sig figs

55
Q

5988

has how many significant figures?

A

5988

Has 4 sig figs

56
Q

9.7703

has how many significant figures?

A

9.7703

Has 5 sig figs

57
Q

30.0004

has how many significant figures?

A

30.0004

Has 6 sig figs

58
Q

0.007

has how many significant figures?

A

0.007

Has 1 sig fig

59
Q

4328.9

has how many significant figures?

A

4328.9

Has 5 sig figs

60
Q

81.909

has how many significant figures?

A

81.909

Has 5 sig figs

61
Q

2807

has how many significant figures?

A

2807

Has 4 sig figs

62
Q

2005

has how many significant figures?

A

2005

Has 4 sig figs

63
Q

987.4

has how many significant figures?

A

987.4

Has 4 sig figs

64
Q

48923.4

has how many significant figures?

A

48923.4

Has 6 sig figs

65
Q

0.05

has how many significant figures?

A

0.05

Has 1 sig fig

66
Q

0.08800

has how many significant figures?

A

0.08800

Has 4 sig figs

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