Express the number appearing in the following statement in stand

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 Multiple Choice QuestionsShort Answer Type

51.

Express the number appearing in the following statement in standard form.

1 micron is equal to 1 over 1000000m.

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52.

Express the number appearing in the following statement in standard form.

Charge of an electron is 0.000,000,000,000,000,000, 16 coulomb.

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53.

Express the number appearing in the following statement in standard form.

Size of a bacteria is 0.0000005 m

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54.

Express the number appearing in the following statement in standard form.

Size of a plant cell is 0.00001275 m


 because space 0.00001275 space equals space fraction numerator 1275 space over denominator 100000000 end fraction
space space space space space space space space space space space space space space space space space space space space space space space space equals space 1275 over 10 to the power of 8 space equals space fraction numerator 1.275 space cross times space 10 cubed over denominator 10 to the power of 8 end fraction

∴  space space 1.275 space cross times space 10 to the power of 3 minus 8 end exponent space equals space 1.275 space cross times space 10 to the power of negative 5 end exponent

∵     Size of a plant cell is 1.275 space cross times space 10 to the power of negative 5 end exponent space straight m

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55.

Express the number appearing in the following statement in standard form.

Thickness of a thick paper is 0.07 mm.

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56.

In a stack there are 5 books each of thickness 20 mm and 5 paper sheets each of thickness 0.016 mm. What is the total thickness of the stack?

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57.

Write each of the following in standard form:

(i) 1,50,000,000,000                              (ii) 0.000007

(iii) 0.0016                                         (iv) 0.00001278

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58.

The distance of the sun from the earth is 1,49,600,000,000 m. Express it in a standard form.

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59.

Express the following numbers in standard form:

(i) 0.00035            (ii) 4050000

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60.

Express the following numbers in usual form:

(i)  3.52 space cross times space 10 to the power of 5      (ii) 7.54 space cross times space 10 to the power of negative 5 end exponent    (iii) 3 space cross times space 10 to the power of negative 5 end exponent


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