MCQ
A stone of 1 kg and another stone of 2 kg are simultaneously released freely from the same height. What will be the ratio of time taken by the stones to fall on the earth?
- ✓$1: 1$
- B$1: \sqrt{2}$
- C$1: 2$
- D$1: 3$
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Statement $1:$ In the resonance tube experiment, if the tuning fork is replaced by another identical turning fork but with its arm having been filled, the length of the air column should be increased to obtain resonance again.
Statement $2:$ On filling the arms, the frequency of a tuning fork increases.

$1.25 \;s , 1.24\; s , 1.27\; s , 1.21 \;s$ and $1.28\; s$
What is the percentage relative error of the observations?