Can a perfect blackbody be realized in practice ?

Can a Carnot engine be realised in practice ?

What is realized niche?

What acts as a perfect black body in Fery's perfect, black body?

Why is the double walled sphere in Fery's perfect black body evacuated?

The specific heats C_rho and C_v of a perfect gas are reflected at

Oral work : How is one kilogram as a standard defined in practice ?

Theratioof emissive powerof perfectly blackbody at 1327 ^@C and 527 ^@C is

One black body at temperature T is surrounded by another black body at temperate T_1(T_1ltT) . At T, the radiation emitted by inner blackbody per unit area per second is proportional to