Doubtly
@Doubtly · Joined Feb 2021
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- Why two or more mercury drops form a single drop when brought in contact with each other? A spherical shape has the minimum surface area-to-volume ratio of all geometric forms. When two drops of a liquid are brought in contact, th... 1
- What is an incompressible fluid? A fluid which does not undergo change in volume for a large range of pressures. Thus, its density remains constant throughout the fluid for... 1
- Why is a low density liquid used as a manometric liquid in a physics laboratory? An open tube manometer measures the gauge pressure, p = p0 + hρg, where p is the pressure being measured, p0 is the atmospheric pressure, h... 1
- What is the basis of the Bernoulli's principle? Conservation of energy is the basis of the Bernoulli’s principle Bernoulli’s equation states that the work done per unit volume of a fluid b... 1
- How much amount of work is done in forming a soap bubble of radius r? Let T be the surface tension of a soap solution. The initial surface area of soap bubble = 0 The final surface area of soap bubble = 2 × 4πr... 1
- Why is the surface tension of paints and lubricating oils kept low? For better wettability (surface coverage), the surface tension and angle of contact of paints and lubricating oil must be low. 1
- 1) Multiple Choice Questions chapter 2 Mechanical Properties of Fluids maharashtra board i) A hydraulic lift is designed to lift heavy objects of maximum mass 2000 kg. The area of cross section of piston carrying the load is 2.25... 1
- b) Vegetation is scarce in the high altitude of the Himalayas. As the altitude increases, the temperature decreases. The climate is very cold in the high altitudes. In Jammu and Kashmir and parts of Hima... 1
- a) The northern part of Brazil is covered with dense forests. The northern part of Brazil lies in the equatorial region.It receives ample sunlight and about 2000 mm of rainfall throughout the year.In th... 1
- E) Why does the deciduous type vegetation occupy most of India? Vegetation in a region is affected by the climate and rainfall of the region. In dia lies in the tropical zone and it has a monsoon type cli... 1
- D) What are the major causes of degradation of forest in Brazil and India? The major causes of degradation of forest in Brazil and India are India Overgrazing, soil degradation, land clearance, climatic changes, exc... 2
- C) What environmental issues are faced by Brazil and India? The biggest environmental issue faced by Brazil is the deforestation of the Amazon rainforests. The Amazon rainforests are known as the ‘lun... 1
- B) Correlate wildlife and natural vegetation in India and Brazil. Wildlife: A)India: Different species of mammals are part of the Indian wildlife.Some of these are, Asian elephants,Royal bengal tigers,Asian... 2
- A) Differentiate between the forest types of Brazil and India. Forest type of Brazil Forest type of India Brazil holds about one-third of the world’s remaining rainforests, including a majority of the Am... 2
- Q3 Match the column geography chapter 5 Column ‘A’ Column ‘B’ Evergreen Forests (c) Pau Brasil Deciduous forests (e) Teak Coastal forests (a) Sundari trees Himalayan forests (b) Pi... 1
- Q2 identify the odd man out (1) Forest type of Brazil ______. (a) Thorny bush type vegetation (b) Evergreen forests (c) The Himalayan Forests (d) Deciduous forests Answ... 1
- On the basis of the information given in the chapter, figures and maps, complete the table below: S.No. Type of forest Characteristics Regions in India Regions in Brazil (1) Tropical Forests Broad-leaved evergreen trees. Andaman and Nicob... 1
- (b) Explain the importance of the Himalayas and the Indian Ocean with respect to the climate of India. The importance of Himalayas and the Indian Ocean with respect to the climate of India can be explained as follows : The Indian Ocean and Him... 2