Question 1: Find the number of significant Figures in each of the following measurements:
(i) (ii)
(iii)
(iv)
(v)
(vi)
(vii)
(viii)
(xi)
(x)
(xi)
(xii)
Answer:
i) has two significant figures
ii) has four significant figures
iii) has three significant figures
iv) has three significant figures
v) has four significant figures
vi) has two significant figures
vii) has six significant figures
viii) has five significant figures
xi) has eight significant figures
x) has four significant figures
xi) has four significant figures
xii) has six significant figures
Question 2: Round off each of the following measurements correct to four significant figures:
i) ii)
iii)
iv) v)
vi)
Answer:
i)
The measurement has
significant figures.
To round it off to significant figures, we require rounding it off to
places after the decimal.
Therefore rounded off to
significant figures.
ii)
The measurement has
significant figures.
To round it off to significant figures, we require rounding it off to
places after the decimal.
Therefore rounded off to
significant figures.
iii)
The measurement has
significant figures.
To round it off to significant figures, we require rounding it off to
places after the decimal.
Therefore rounded off to
significant figures.
iv)
The measurement has
significant figures.
To round it off to significant figures, we require rounding it off to
places after the decimal.
Therefore rounded off to
significant figures.
v)
The measurement has
significant figures.
To round it off to significant figures, we require rounding it off to
places after the decimal.
Therefore rounded off to
significant figures.
vi)
The measurement has
significant figures.
To round it off to significant figures, we require rounding it off to
places after the decimal.
Therefore rounded off to
significant figures.
Question 3: Round off:
i) correct to three significant figures.
ii) correct to four significant figures.
iii) correct to two significant figures.
iv) correct to three significant figures.
v) correct to one significant figure.
vi) correct to two significant figures.
Answer:
i) correct to three significant figures
ii) correct to four significant figures
iii) correct to two significant figures
iv) correct to three significant figures
v) correct to one significant figure
vi) correct to two significant figures
Question 4: Round off:
i) to the nearest rupee ii)
to the nearest gram
iii) to the nearest paisa iv)
to the nearest cm
Answer:
i) to the nearest rupee
ii) to the nearest gram
iii) to the nearest paisa
iv) to the nearest cm