Physics
The intensity ratio of waves is 25 : 9. What is the ratio of their amplitudes?

0.12847222222222
0.21041666666667
2.0958333333333
1.0479166666667

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Physics
Absolute Zero is defined as

At which water boils at 298K
The temperature at which all molecular motion ceases
At which the volume becomes zero
At which liquid Helium boils

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