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Measurement

Total questions: 10

Worksheet time: 8mins

Name
Class
Date
1.

The measurement 43.1040 has ______ significant figures.

a)

3

b)

4

c)

5

d)

6

2.

The measurement 5.130 x 10 -4 has _____ significant figures

a)

3

b)

4

c)

5

d)

6

3.

Compute

 (3 x 108 )(8 x 104)(6 x 105)\frac{\left(3\ x\ 10^8\ \right)\left(8\ x\ 10^4\right)}{\left(6\ x\ 10^5\right)}  

a)

 4 x 1074\ x\ 10^7  

b)

 6 x 1026\ x\ 10^2  

c)

 4 x1074\ x10^{-7}  

d)

 1.2 x 10171.2\ x\ 10^{17}  

4.

Evaluate (4.0 x 10-6) (3.0 x 104)

a)

1.2 x 1011.2\ x\ 10^{-1}

b)

12.0 x 10212.0\ x\ 10^2

c)

1.2 x 10121.2\ x\ 10^{12}

d)

1.2 x 1021.2\ x\ 10^{-2}

5.

Which of the following prefixes does NOT represent a fractional part of a whole unit?

a)

kilo

b)

nano

c)

micro

d)

deci

6.

The density of seawater was measured to be 1.07  gcm3\frac{g}{cm^3}  . This density in SI unit in  kgm3\frac{kg}{m^3}  is ___________. 

a)

 1.07 x 1031.07\ x\ 10^3  

b)

 1.07 1031.07\ 10^{-3}  

c)

 1.07 x 1041.07\ x\ 10^4  

d)

 107107  

7.

The prefix mega means ?

a)

10610^{-6}

b)

10610^6

c)

10310^3

d)

10910^9

8.

Solve : (2.78 x 108) (5.31 x 109)\left(2.78\ x\ 10^{-8}\right)\ -\left(5.31\ x\ 10^{-9}\right)  

a)

 1.48 10161.48\ 10^{-16}  

b)

 2.25 x 1082.25\ x\ 10^{-8}  

c)

 3.31 x 1083.31\ x\ 10^{-8}  

d)

 5.23 x 1005.23\ x\ 10^0   

9.

Which of the following is a fundamental unit of the SI system of units?

a)

Joules

b)

Newton

c)

Pascal

d)

Kilogram

10.

Light travels a 3 x 108 m/s, and the size of a proton is about 1 fm. Calculate the order of magnitude for the time taken for light to pass across a proton.

a)

102310^{-23}

b)

102210^{-22}

c)

10710^{-7}

d)

10810^{-8}