Nur Jahan (born Mehr-un-Nissa) (31 May 1577 – 17 December 1645) was Empress consort of the Mughal Empire from 25 May 1611 to 28 October 1627 as the eighteenth (and last) wife of the Mughal emperor Jahangir. She was also his most beloved and influential wife and acted as his chief consort and Padshah Begum, officially from 1620–1627.
Q7.__________ resources are those resources whose quantity is known.
_______संसाधन वे संसाधन होते हैं जिनकी मात्रा ज्ञात होती है |
Natural resources are resources that exist without actions of humankind. This includes all valued characteristics such as magnetic, gravitational, and electrical properties and forces etc.
Actual resources are those that have been surveyed, their quantity and quality determined, and are being used in present times. For example, petroleum and natural gas is actively being obtained from the Mumbai High Fields.
Potential resources – Potential resources are resources which exist in a region and which can be used in the future. For example:- Mineral oil may exist in many parts of India where sedimentary rocks are found but till it is actually drilled out and put into use, it remains a potential resource.
Abiotic resources – A type of natural resource derived from non-living things as opposed to biotic resource derived from living things. Examples of abiotic resources are water, land, ores and air.
Q8. The main mineral constituents of the continental mass are ________ and alumina.
महाद्वीपीय संहति मुख्य रूप से_____और ऐलुमिना जैसे खनिजों बनी है |
The crust is the outermost layer over the earth’s surface. It is the thinnest of all the layers and about 35 km on the continental masses and only 5 km on the ocean floors. The main minerals constituting the continental mass are – silica and alumina. The continental mass is also called ‘sial’. The main mineral constituents of the oceanic crust are –silicon and magnesium. The oceanic crust is called ‘sima’.
Q9. Among plants, three different genera Solanum, Petunia and Datura are placed in which family?
पौधों में तीन विभिन्न वंश सोलेनम,पिटुनिआ और धतूरा को किस कुल में रखा गया है?
Plane mirrors – A plane mirror is a mirror with a flat (planar) reflective surface. For light rays striking a plane mirror, the angle of reflection equals the angle of incidence. The angle of incidence is the angle between the incident ray and the surface normal.
Spherical mirrors – A spherical mirror is a mirror which has the shape of a piece cut out of a spherical surface. There are two types of spherical mirrors: concave, and convex.
Inverted mirror – A non-reversing mirror (a flip mirror) is a mirror that presents its subject as it would be seen from the mirror. A non-reversing mirror can be made by connecting two regular mirrors at their edges at a 90 degree angle. If the join is positioned so that it is vertical, an observer looking into the angle will see a non-reversed image.
Erect mirror – An erect image, in optics, is one that appears right-side up. An erect image is formed by the actual intersection of rays. It is an image in which directions are the same as those in the object, in contrast to an inverted image. Some telescopes and other devices such as the camera obscura present an inverted image on the viewing surface.
Q13. The frictional force exerted by fluids is also called ________.
Buoyancy – buoyancy or upthrust, is an upward force exerted by a fluid that opposes the weight of an immersed object. In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid.
Convection – Convection is the heat transfer due to bulk movement of molecules within fluids such as gases and liquids, including molten rock. Convection takes place through advection, diffusion or both.