sun high availability

A 50 ft high building casts a 20 ft shadow. At the same time, a taller building that is 40 ft away, directly towards the sun casts a shadow that falls half way up the smaller building. What is the height of the taller building? => 100 ft or 125 ft or 150 ft or 200 ft..

A telegraph pole is 100 m high. Its shadow is 100 3 m in length. Find the angle of elevation of the sun. => 30° or 45° or 60° or 75°..

Resources which are in limited amounts and cannot be renewed are called non-renewable energy resources. Fossil fuels like coal and petroleum are some examples. Petroleum products are energy-rich components of carbon which have undergone anaerobic degradation with the help of sun's energy..

Gases do not posses any definite shape or volume. They will completely fill all the space available to them. The tendency of a gas to fill the available volume within a container is the result of the freedom that gas particles have to move everywhere in the available ..

Shape and volume - Gases do not posses any definite shape or volume. They will completely fill all the space available to them. The tendency of a gas to fill the available volume within a container is the result of the freedom that gas particles have to move everywhere in the ..

Ocean Thermal Energy - The water at the surface of an ocean gets heated by the heat of the sun and attains a higher temperature than the colder water at deeper levels in the ocean. So, there is always a temperature difference between the water "at the surface of ocean" and "at deeper leve..

The tides are formed due to the gravitational force of attraction between the earth, sun and moon. During high tides sea water is trapped in a reservoir, and released later to drive turbines, which in turn produces electricity. The block diagram given below illustrates the..

Environmental Consequences - The energy source that we actually choose depends on various factors like the cost, the ease with which it is available, the efficiency of the technology available and the environmental damage that will be caused by using that source. It is thus deba..

D.D.T. is not biodegradable. Its residues accumulate in environment and the long term effects could be highly dangerous. It has been proved to be toxic to living beings. Therefore, its use has been abandoned in many Western countries. However, inspite of its dangerous side effects, DDT i..

Lindemann (1942) put forth ten percent law for the transfer of energy from one trophic level to the next. According to the law, during the transfer of organic food from one trophic level to the next, only about ten percent of the organic matter is stored as flesh. The remaining is lost during trans..