Water moves up against gravity and even for a tree of 20m height, the tip receives water within two hours. The most important physiological phenomenon which is responsible for the upward movement of water is________.

A water tank on the ground with water upto a height of 20 m has a small orifice in its wall at a distance 10 m below the surface level of water. Then the horizontal distance from the hole at which the water touches the ground is

The coutries which do not have oil reservatirs in their land import oil from other countries. But sometimes during transporting oil through sea routes, accidental oil spilling occurs. This oil spilled in the ocean may prove fatal and toxic to aquatic animals. Therefore, removel of this spilled oil is essential for protection of aquatic life. For removing this oil layer, certain microbes like Pseudomonas spp. and Alcanivarax borkumensis are used. These microbes have the ability to destroy the pyridines and other toxic chemicals. The hydrocarbonoclastic bacteria (HCB) are able to decompose the hydrocarbons and bring about the reaction carbon with oxygen resulting in formation of CO_(2) and water. Like oil spills cause damage to aquatic life, platic forms the major part of the grabage on land. Plastics are difficult to degrade as they are made up of PET. By research, various species like Vibrio and Idenoella sakaiensis which can degred PET.By research, various species like Vibrio and Ideonella sakaiensis which can degrade PET have been identified. There are cartain species of microbes which can decompose rubber from garbage. Based on the given paragraph answer the following question. Name any two species of microbes which can degrade rubber from

The surface tension of water is 0.072 N/m. The height to which water will rise in a capillary tube of bore diameter 0.048 cm will be (Angle of contact of water is zero , acceleration due to gravity is 10 m//s^2 and density of water =1000 kg//m^3 ).

A cylindrical tank having cross-sectional area A is filled with water to a height of 2.0 m. A circular hole of corss-section area is opened at a height of 75 cm from the bottom. If a//A=sqrt(0.2, then velocity with which waer emerges from the hole is (g =9.8 ms^(-2))

The surface tension of water is 7 xx 10^(-2) N/m . Find the height at which water rises in a capillary tube of glass having a bore of uniform radius 0.2 mm. (Density of water = 1000 kg /m^3 , acceleration due to gravity = 9.8 m /s^2 )