1/(focal length) = 1/(distance of object) + 1/(distance of image) is the formula for calculating x of a lens knowing only the focal length which is the distance from the lens to the image of sun formed by it.
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That's what the "dress right, dress" command is for.
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arms length
by knowing any thing
This is not at all unusual. Volume for instance is formed from length, width, and depth. Electrical power is formed from knowing voltage and current. Speed from distance and time. There are many examples easy to think of.
Present perfect continuous is formed by - have / has been verb + ing.have been waiting.But know is a state verb and state verbs are not usually used in the continuous form eg knowing.So probably you would never use have been knowing.I have been knowing him for 15 years is not correct.
It is the distance of the extension of what your eyes can see. If the earth wasn't formed, there can be no possibility of measuring distances to or from it.
generally vena contracta is formed at distance of d/2 from orifice where d is diameter of orifice.
by knowing olivia and rebecca and katie
Bias