Physics
For accurate scientific work, temperatures are often measured by

Alcohol thermometers
Mercury thermometers
Thermoelectric thermometers
Platinum resistance thermometers

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Physics
It is easier to roll a stone up a sloping road than to lift it vertical upwards because

Work done in rolling is more than in lifting.
Work done in both is same but the rate of doing work is less in rolling.
Work done in rolling a stone is less than in lifting it.
Work done in lifting the stone is equal to rolling it.

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Physics
The Hooke's law is valid for

Elastic as well as plastic region of the stress strain curve
Only proportional region of the stress strain curve
Entire stress strain curve
Entire elastic region of the stress strain curve

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