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The temperatures of two bodies measured ...

The temperatures of two bodies measured by a thermometer are :`t_1=(20^@C+-0.5^@C)`and `t_2=(50^@C+-0.5^@C)`.Calculate the temperature difference and the error therein.

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`Deltat=t_2-t_1=(50^@C+-0.5^@C)-(20^@+-0.5^@C)=30^@C+-1C^@`
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