HARD: H1. The rate at which the radient energy reaches the surface from the sun is about 1.4 kw/m2. The distance from the earth to the sun is about 1.5 x 1011 and the radius of sun is about 0.7...

Medium: M1: One end of a rod of length 20cm is inserted in afurnance at 800k. the sides of the rod are covered with an insulating material and the other end emits radiation like a black body....

K(Csu) = 0.92      K(steel) = 0.12 and K(brass) = 0.26 C.G.S. units. Solution: Q = 400c H = 4.8 cal/s. Q5: one end of the copper rod ofuniformcross-section and...

Q: A metallic plate has a black spoy in the center.the plate is heated to 1000c and taken to dark room. the black spot glows why ? A: It radiates in visible region. Q: The surfaces of...

Stefan's Law of Radiation: The total radient energy emitted E per unit time by a black body of surface A is propertional to the fourth power of its absolute temperature.     E ...

Considering unit cross -section area of ice , if alayer of thickness dx given in time dt, The heat given by thin layer.   = mass x Latent heat   = 1.dx..L. = density of ice L =...

Introduction Heat Transfer helps us to understand various aspects for the transfer of heat through various materials(solids, liquid and gasses) through various known process such as conduction, ...

Q. ends. Its lies ...... sum containg Hg & two equal ends containing air at same pressure Po. When tube is held at < 600 with vertical, length of air column above & below mercury are 46...

Question: & 0.0566 L mol. Calculate a, b & R Ans: Given TC = 374 + 273 = 647 K, PC = 218 atm VC = 0.0566 L mol-1 = 0.0189 L mol-1     a = 3PCVC2 = 3 x 218 x...

Equating (i) to zero T = T = As v     T Tboyle's Critical parameter pertaining to its liquefication. (1) Critical pressure (2) Critical Temperature (3) Critical...

Under all temperature & pressure. No gas is ideal but they are real gases which obeys ideal gas eq. at low pressure & high temperature. Ideal gas is characterised by following...

VI. Kinetic Molecular Theory of Gases: (a) Postulates: (i) Molecules of gas are separated from each other by large distance so, actual volume of molecule is negligible as compared to total...

(c) Avogardo's Law: Equal volume of all gases under same conditions of temperature & pressure contain equal no of molecules.    V = Kn But n = (m = mass, M = Molar gas) V = =...

Chemistry: Physical Chemistry The Gas Laws started .... in 1643 A.C. with invention of the barometer and continued until 1873 with the Vancer Waal's Equation. The gas law led to numerous concepts...

Volume Expansion:- V1 : Volume at T1 V2 : Volume at T2       T2 > T1 V2 = V1 (1 + )

Calorimetry And Thermal Expansion Introduction Calorimetry can be considered to be the earliest known principal of Heat and Thermodynamics. This was the introduction of the widely used principal...