Most of the plans to raise the Titanic were impracticable due to the great depth of the ocean.
it is impracticable because the time period of sampled impulse is 0 i.e t=0 and in real life it is impossible to produce a signal of 0sec.
the second expedient is as impracticable as the first would be unwise.
i do not know how to use embalming in a sentence. (there is the sentence)
Chilton Rowe has written: 'Is it so impracticable?' -- subject(s): Socialism
So- you are asking when to use 'when' in a sentence. When you are asking how to use when in a question, you are already using when in a sentence, because a question actually is a sentence. I like to use when in a sentence whenever I like.
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use ize in sentence