Student or Learner
I'm always in trouble with the word "over", I just can't understand what this mean. for example in the sentence below can I replace it with "at"?
Methods of measuring the rate of consensate production over a number of short lenght along a tube are introduced.
In this case, the word "over" would mean the same as "encompassing" (you could substitute the word "from" and be mostly correct). You could measure the condensate from a short length of tubing, but it might be misinterpreted that the condensate is coming from the interior of the tube. Using the word over removes the ambiguity/uncertainty of this.
They are measuring the condensate produced along a length of tube. They do this for a variety of different lengths. The "over" is referring to the varying lengths. Whether this condensate is inside or outside of the tube is not specified, but I would think it was inside.