convert heat energy into mechanical energy

There are two types of heat engines: external combustion engines and internal combustion engines. Steam engine is an example of external combustion engine. In such an engine, the fuel is burnt outside the working portion of the engine. A heat engine consists essentially of the..

Take two beakers one with hot water and another with cold water. Dip your fingers in hot water your finger experience hotness. Then dip your fingers in cold water. Your fingers experience coldness. What makes the water hot or cold? Heat energy content in a body makes it hotter ..

Although matter circulates, energy cannot be reused indefinitely. Solar energy is converted by the photosynthetic producers (plants) into chemical energy in the form of plant carbohydrates. Herbivores consume the plant carbohydrates and so this chemical ..

. (iii) Loss of one a - particle. decrease in mass number is 4 and decrease in atomic number is 2. Example 7:- Calculate the energy released when 1 kg mass is completely converted to energy (C = 3 x 10 8 m/s). Suggested Answer:- Example 8..

Digestion - breaking down food into simpler forms. Digestion is both and chemical . The digestion may take place outside cells ( extracellular ) or within the cells ( intracellular ). Absorption - Taking in of food in the soluble forms into the tissues. The absorption may be passive (without ..

We know that there is a transfer of energy, as heat, between a system and its environment. Here we discuss how this transfer takes place. There are three mechanisms of heat transfer. They are conduction, convection and radiati..

Energy changes in chemical reactions can also take place in forms other than heat, such as light, electricity, mechanical energy, etc. Some common examples are: The burning of petrol or diesel in motor engines of cars, trucks, tractors or buses produces ..

Energy is the capacity to do work. Solar energy is transformed into chemical energy by the process of photosynthesis, and is stored in plant tissue and then transformed into mechanical and heat forms during metabolic activitie..

. Rainwater, which seeps into the ground and slowly percolates down through cracks in the upper crust, also gets heated by the hot rock beneath. In certain areas below the earth's surface, hot magma swells up into the crust, but remains trapped below the surface of the earth. Such areas i..

Energy Flow - All living beings require a constant supply of energy for the various functions they perform. The energy is obtained from the sun. This energy is introduced into the biosphere by green plants by a process known as photosynthesis. Plants are able..