It is heard sometime that mercury is used in defining the tempera… - Vidyadip

Question

It is heard sometime that mercury is used in defining the temperature scale because it expands uniformly with temperature. If the temperature scale is not yet defined, is it logical to say that a substance expands uniformly with temperature?

✓

Answer

It is not illogical to say that mercury expands uniformly before temperature scale was defined. It's uniform expansion can be studied by comparing the expansion of mercury with expansion of other substances (like alcohol water etc).

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "2 Marks Questions" from Heat and Temperature→Heat and Temperature — all question types→Physics STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

Explain with example why matter particle acquires electric charge.

A metal rod of square cross-sectional area A having length l has current I flowing through it when a potential difference of V volt is applied across its ends (figure I). Now the rod is cut parallel to its length into two identical pieces and joined as shown in figure II. What potential difference must be maintained across the length 2l so that the current in the rod is still I?

Answer the following question:
The refractive index of diamond is much greater than that of ordinary glass. Is this fact of some use to a diamond cutter?

Write the formula for the force per unit length between two parallel current carrying wires. Using it, write the definition of Ampere and Coulomb.

A man of mass $50\ kg$ starts moving on the earth and acquires a speed of $1.8\ m/s.$ With what speed does the earth recoil? Mass of earth $= 6 \times 10^{24}kg.$

An oil drop of $10^{-6} m$ diameter and density $880.5 kg / m ^3$ remains stationary between plates separated by 10 mm . The potential difference between the plates is 36 volts. Find the number of electrons on the oil drop. $\left( g =10 m / s ^2\right)$

A plate of thickness t made of a material of refractive index $\mu$ is placed in front of one of the slits in a double slit experiment.

Find the change in the optical path due to introduction of the plate.
What should be the minimum thickness t which will make the intensity at the centre of the fringe pattern zero? Wavelength of the light used is $\lambda$. Neglect any absorption of light in the plate.

In the given figure, if the Wheatstone Bridge is balanced, then find the magnitude of unknown resistance $X$.

What is magnetisation ? Derive the relationship between magnetisation and magnetic intensity.

Two positive point charges $12 \mu C$ and 5 $\mu C$ are present in air at a distance of 10 cm from each other. Calculate the work required to bring them closer to 4 cm .