Embibe Experts Solutions for Exercise 2: Assignment

According to _____'s law of cooling, the rate of cooling of a body is proportional to the excess temperature of the body over the surrounding.

If the coefficient of cubical expansion is $x$ times the coefficient of superficial expansion, then value of $x$ is

The absorption coefficient of a perfectly black body is

A metallic bar is heated from $0°\mathrm{C}$ to $100°\mathrm{C}$. The coefficient of linear expansion is ${10}^{-4}{ \mathrm{K}}^{-1}$. The percentage increase in its length is

$160 \mathrm{g}$ of water at $60°\mathrm{C}$ is poured over a large block of ice at $0°\mathrm{C}$. The mass of ice that melts is. Latent heat of ice $L=80 \mathrm{cal} {\mathrm{g}}^{-1}$

The SI unit of specific heat capacity is _____ per Kelvin per kilogram.

The value of Wien's constant is _____$\times {10}^{-3} \mathrm{m} \mathrm{K}$. (Correct to one decimal place)

The value of emissivity for tungsten is about _____.