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Is electron really a particle or wave?
Upto the year 1924, electron was exclusively regarded as a particle. However, in 1924, de-Broglie suggested that an electron behaves both as a material particle and as a wave. Just like light, some experimental facts can be explained by assuming electrons as tiny particles while some other facts c..
Important Features of Water Pollution
Water pollution can be point source or non - point source. That is, it can be caused near the source of pollution or where source of pollution is sometimes far away from source. Nature also contributes to water pollution besides human activities. The concentration of pollutants is generally..
What shall be the most important objective of selecting sample from a ..
What shall be the most important objective of selecting sample from a population? => Sample selection shall be cost saving. or Each subject in the population shall have an equally likely chance of being selected. or Maximum number of samples shall represent the population. or Sample shall..
The line graph represents the number of cars (in millions) imported be..
The line graph represents the number of cars (in millions) imported between the years 1996 and 2000. Find the ratio of the maximum imports of cars to the minimum imports of cars. => 5 : 2 or 1 : 5 or 2 : 5 or 5 : 1..
The U.S. imported 600 million tons of cotton in the year 2000 and the ..
The U.S. imported 600 million tons of cotton in the year 2000 and the imports fell to 500 million tons in the year 2001. Find the percent of decrease in the imports of cotton. => 16 2 3 or 16 3 4 or 16 1 3 or None of the above..
Using the line graph, find the year in which the maximum number of car..
Using the line graph, find the year in which the maximum number of cars were imported. => 1996 or 1998 or 2000 or 1997..
The table shows the details of foreign commerce in the U.S. Find the r..
The table shows the details of foreign commerce in the U.S. Find the ratio of the general imports in the year 1990 to that in the year 2000. => 1 : 99 or 1 : 244 or 244 : 99 or 99 : 244..
Some important results
Important results in proportions are: Invertendo, Alternendo, Componendo, Dividendo and Componendo and Dividend..
Importance of Classification
Importance of Classification - By making a comparative study and assorting the similarities and differences amongst the various varieties of species, organisms can be classified into groups or sets. Taxonomy is a regular branch of science that is involved with the purpose of arranging or ..
Importance of Chemistry
Importance of Chemistry - The branch of science, which deals with the study of matter, its composition, its properties and the changes that it undergoes in composition as well as in energy during various processes, is defined as chemistry. It has been further divided into different branch..
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