Question 284: Units , Dimensions and Error Analysis

Question

A cube has a side of length 1.2 ✕ 10
-2
m. Calculate its volume.

Accepted Answer

We have
V = l
3
= (1.2 $$	imes$$ 10
$$-$$2
)
3
= 1.728 $$	imes$$ 10
$$-$$6
m
3
Since l has two significant figures, V should also have two significant figures; hence,
V = 1.7 $$	imes$$ 10
$$-$$6
m
3
Answer (A)

Answer

1.7 ✕ 10
-6
m
3

Answer

1.73 ✕ 10
-6
m
3

Answer

1.70 ✕ 10
-6
m
3

Answer

1.732 ✕ 10
-6
m
3

Units , Dimensions and Error Analysis

A cube has a side of length 1.2 ✕ 10 -2 m. Calculate its volume.

Choose the correct answer: