__________ are light in weight and are carried away by wind during winnowing.
A caesium photocell, with a steady potential difference of 60V across, is illuminated by a bright point source of light 50 cm away. When the same light is placed 1m away the photoelectrons emitted from the cell
During the downpour in a village, the rain water carried away excess away excess of nitrogenous and other compounds present in the soil to a pond. How will they affect the growth of algale and phytoplankton in the pond ?