Consider a metal scale of length 30cm and an object. The scale is calibrated for temp 20^(@)C. (...

At room temperature ( 25^@C ) the length of a steel rod is measured using a brass centimetre scale. The measured length is 20 cm. If the scale is calibrated to read accurately at temperature 0^@C , find the actual length of steel rod at room temperature.

Find the change in the temperature on the Fahrenheit scale and on Kelvin scale, if an iron piece is heated from 30^(@)C" to "90^(@)C .

The moment of inertia of a meter scale of mass 0.6 kg about an axis perpendicular to the scale and located at the 20 cm position on the scale in kg m is (Breadth of the scale is negligible)

The moment of inertia of a metre scale of mass 0.6 kg about an axis perpendicular to the scale and passing through 30 cm position on the scale is given by (Breadth of'the scale is negligible)

For measuring temperature Celsius scale, Fahrenheit scale , Kelvin scale and Reaumur scale may be used. The scale on which ice point is taken as 0^@C and steam point is taken as 100^@C is

A telescope has an objective of focal length 30 cm and an eye piece of focal length 3.0 cm . It is focussed on a scale distant 2.0 m . For seeing with relaxed aye, calculate the separation between the objective and eye piece.