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Posted by **bobby** on Monday, December 28, 2009 at 7:11am.

how would you write 0.15 nm in standard form?

how would you write 565 nm in normal numbers?

how would you write 590 nm in normal numbers?

thanks

- math -
**PsyDAG**, Monday, December 28, 2009 at 8:07amYes, 1 nm = 0.000000001 m

As far as I know, all of the above are standard or normal form, using nm as the unit.

- math -
**MathMate**, Monday, December 28, 2009 at 8:11amHere are some common metric prefixes, symbols and the corresponding multiplicative factors that may help you:

tera (t)- 1,000,000,000

mega (m) - 1,000,000

kilo (k) - 1,000

milli (m) - 1/1,000

micro (μ) - 1/1,000,000

nano (n) - 1/1,000,000,000

For example,

1 ns = 0.000 000 001 second

1 mm = 0.001 metre

1 mb = 1,000,000 bytes

(note: sometimes mb is used to mean 1,048,576 bytes, equal to 2^{20}bytes).

- math -
**bobby**, Monday, December 28, 2009 at 8:21amfor the last two questions i meant decimal form, im so confused

- math -
**MathMate**, Monday, December 28, 2009 at 10:27amYou probably meant in "decimal metres".

565 nm = 0.000 000 565 metre

Notice that I have used a "space" as a digital group separator. Depending on the context, a comma is more commonly used in U.S. while the space is recommended by the ISO.

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