changes in supply and demand

Humans depend on the forests largely to meet rapidly growing demands for timber, fibre, fuel, fresh water and food. All use forest produce in one form or other, e.g., when used as timber, paper, herbs and spices. Modern approaches in forest conservation have found that enforcement of fo..

. This internal energy expresses itself as the temperature of the substance. Thus, if a solid is heated, its molecules vibrate more vigorously within the intermolecular space. Its internal energy increases and hence, its temperature increases. If the solids are heated further, at a certain stage th..

We are an integral part of the environment. Our activities change the environment around us. Changes in the environment affect us. Environmental problems like depletion of the ozone layer and waste disposal are issues that have to be dealt with serious concern. In our daily a..

. There are some worrying facts about the water situation. The effects of world climate change are being all over including the Indian subcontinent. The increased temperature levels are resulting in changing weather patterns. For a country like India whose agricultural activitie..

Petroleum gas a by-product from two sources: natural gas processing and crude oil refining is a mixture of butane, propane and ethane. The main constituent of liquefied petroleum gas is, however, propane, propylene, butane, butylene in various mixtures. These hydrocarbons burn readily, producing a..

. But when sides of the coil interchange their positions, then the two commutator half rings R 1 and R 2 automatically change their contacts from one carbon brush to the other. Due to this change, the current keeps flowing in the same direction. Thus a DC generator supplies..

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..

1) Besides inorganic nutrient input, with the inflow of waste water, decomposition of organic wastes, plant nutrients such as nitrates and phosphates takes place. This promotes the growth of oxygen consuming algae (algal bloom), especially the blue-green algae. The growth of oxygen consuming algae,..

. Everything was done so ungrudgingly and with so much love! Nothing had changed him - his seven children, cattle, fields, and household responsibilities. The second brother, pressurised by his wife, had sold his soul to greed and had become adamant about the partition. Babuli compares th..

Water is the only substance that can exist simultaneously in all the three states of matter, i.e., solid, liquid and gaseous on this earth,. A simple experiment shows the existence of all these three states together. Take a glass half packed with ice cubes and cover it. The ice starts melting. Wate..