problems involving heat flow and temperature changes

) from the steam chamber to the rod is In a time t, the chamber supplies a heat As the mass of the water collected in time t is m, the heat taken by the water is ------(ii) where s is the specific heat capacity of water. As the entire rod is covered with an insulating ..

Do we use dry cells for operating electrical appliance? It is not impossible to tap continuous supply of energy from electrochemical cells. Electrical circuits in homes, factories and offices receive such energy form local power companies. In most countries the energy is supplied via oscillating e...

. Some of the important applications of eddy currents are: Electromagnetic damping, induction furnace, electromagnetic brakes, induction motor speedometers and in diathermy i.e., deep heat treatment of parts of human body. Some of the undesirable effects of eddy currents are that they opp..

Laplace's Correction to Newton's Formula - Assuming isothermal conditions to prevail when sound travels through air, Newton has applied Boyle's law to the changes in pressure and volume. In a region of compression, there is a slight increase in temperature and in a region of rar..

A chemical equation is a shorthand way of describing the events that occur in a chemical change or reaction. The method of representing a chemical reaction with the help of symbols and formulae of the substances involved in it is known as a chemical equation. Exampl..

. where r , called resistivity is a property of the material and depends on temperature and pressure. Electrical resistivity of substances varies over a very wide range. Metals have low resistivity, in the range of 10 - 8 W m to 10 - 6 W m. Insulators like glass and rubber have 10 2 2 to ..

In lower organisms, there is no transport system as the cells are in touch with the surrounding medium. The transport is by the physical processes like diffusion, osmosis, etc. With the advancement in structure, the organisms have to evolve methods to transport nutrients and wastes. The actual..

It is a common observation that most of the reactions when carried out in closed vessels do not go to completion, under a given set of conditions of temperature and pressure. Infact in all such cases, in the initial state, only the reactants are present but as the reaction proceeds, the c..

. The deserts are encroaching the fertile areas in this manner. Prevention and control of soil erosion can be done by increase of vegetation, restoring soil fertility, control of grazing, terracing, dam building and wind breakers. Another of environmental problem is global warming - It is..

The temperature effect on heating a solid varies depending on the nature of the solid and the conditions required in bringing the change..