As we all know, some inventions and scientific discoveries have been done by scientists since the time of our civilization. Some inventions such as airplane, IC, transistor, radar, computers and laser were great and the highest level ones. How long ( years )approximately did they take to finally develop such great things after the date their creative sparks began in their minds? What do you think? I know that they vary on the situation may be 10 years or 20 years. I just want to know average years they took for these inventions. Could you help me?
2006-11-10
06:56:55
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2 answers
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asked by
little rabbit
1
in
Science & Mathematics
➔ Engineering