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HI FREINDS HOW WAS THE PHYSICS ATP GCSE O LAVEL?

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i wrote kay u leave the rod to float and then clamp it to take readings with the help of a rule
 
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For question 1 part 1, I wrote that when we touch the rod with the measuring instrument it starts to move, so we had to keep it at a distance and measure the length which might induce paralllex error hence inaccurate.
 
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I said to take it out and measure till the driest point by aligning with ruler. Difficulty in measurement because container walls would get into way. Ruler cannot be placed into container as it would be too wide.
 
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Because water keeps moving, and rod keeps moving too, that is why it is difficult to align the rule with the rod.
Right or not?

What did you write in same identical rubbers reason?
i wrote that container walls rise above water level so difficult to keep rule close to rod so more chances of error.....
 
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I said to take it out and measure till the driest point by aligning with ruler. Difficulty in measurement because container walls would get into way. Ruler cannot be placed into container as it would be too wide.

Many people wrote that too.

But why can't ruler be placed? Do you know the exact diameter of the tube? Did you measure it? That was a diagram. We don't know the real value.
 
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What is range of last question? I wrote 2.2 because problem with my scale. Would that be inside the range? What do you guys think?
 
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