Physics
Which of the following instrument is used to measure Soil Water Tension?

Photometer
Tensiometer
Psychrometer
Pyrometer

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Physics
In the gamma decay of a nucleus

Neither the mass number nor the atomic number of the nucleus changes
The mass number of the nucleus changes whereas its atomic number does not change
Both the mass number and the atomic number of the nucleus change
The mass number of the nucleus does not change whereas its atomic number changes

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