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Standard IX

Mathematics

Conversion of Units

Prefix naming...

Question

Prefix naming as FEMTO has a factor of:

10¹²

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10^-13

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10^-14

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10^-15

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Solution

The correct option is D
10^-15

Femto- (symbol f) is a unit prefix in the metric system denoting a factor of $10^{- 15}$ or 0.000000000000001. Adopted by the 11th General Conference on Weights and Measures, it was added in 1964 to the SI. It is derived from the Danish word femten, meaning "fifteen".

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Similar questions

Match the following prefixes with their multiples:

	Prefixes	Multiples
(i)	micro	10⁶
(ii)	deca	10⁹
(iii)	mega	10^–6
(iv)	giga	10^–15
(v)	femto	10

Q. How many factors of

N = 12^{12} \times 14^{14} \times 15^{15}

are multiple of

K = 12^{10} \times 14^{10} \times 15^{10}

Q. The ages of students of 10^th class, in a school are as follows. The ages are given in years months.

14

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6, 13

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11, 15

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2, 16

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0, 13

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9, 14

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5, 14

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7, 14

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0,
15

-

0, 15

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1, 16

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2, 14

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1, 13

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11, 16

-

0, 14

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5, 14

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0,
14

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8, 14

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4, 15

-

4, 15

-

9, 15

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1, 14

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10, 14

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8

15

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1, 14

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1, 16

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0, 13

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10, 14

-

0, 15

-

0, 13

-

6, 13

-

11,
14

-

3, 14

-

8, 14

-

7, 14

-

8, 14

-

1, 15

-

0, 15

-

1, 14

-

4,
14

-

9, 14

-

9, 14

-

10, 15

-

3, 14

-

9, 13

-

10, 13

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2, 15

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1,

Prepare a grouped frequency distribution table (classes; 13

-

14, 14

-

15, 15

-

16, ....)

Q. Find the value of the given expression:

\frac{1}{4 - \sqrt{15}} - \frac{1}{\sqrt{15} - \sqrt{14}} + \frac{1}{\sqrt{14} - \sqrt{13}} - \frac{1}{\sqrt{13} - \sqrt{12}} + \frac{1}{\sqrt{12} - \sqrt{11}} - \frac{1}{\sqrt{11} - \sqrt{10}} + \frac{1}{\sqrt{10} - 3}

The marks of

20

students in a test were as follows:

5, 6, 8, 9, 10, 11, 11, 12, 13, 13, 14, 14, 15, 15, 15, 16, 16, 18, 19, 20

The mode is

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Prefix naming as FEMTO has a factor of:

The correct option is D 10-15 Femto- (symbol f) is a unit prefix in the metric system denoting a factor of 10−15 or 0.000000000000001. Adopted by the 11th General Conference on Weights and Measures, it was added in 1964 to the SI. It is derived from the Danish word femten, meaning "fifteen".