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Yogita Ingle 5 years, 9 months ago
- Specific heat is defined as the amount of heat required to raise the temperature of a body per unit mass.
- It depends on:-
- Nature of substance
- Temperature
- Denoted by ‘s’
Mathematically:-
s= (ΔQ /mΔT)
- where m= mass of the body
- ΔQ = amount of heat absorbed or rejected by the substance
- ΔT= temperature change
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Gaurav Seth 5 years, 10 months ago
The earthquake waves develop shadow zones because:
(i)The P and S waves follow a curved path in the interior of the earth which proves that the density increases inside the
earth.
(ii)P and S waves are recorded along the surface near the focus of the earthquake. Beyond the depth of 2900 km ‘S’ wave
disappear and P waves travel with reduced velocity
(iii)On reaching the core ‘S’ waves disappear and P waves are refracted as a result there is no wave for a distance. This
area is known as shadow zone. Normally it is found between 105° to 145°.
Posted by Abhishek Singh 5 years, 10 months ago
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Divya Mishra 5 years, 9 months ago
Posted by Arun Karthik 5 years, 10 months ago
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Yogita Ingle 5 years, 10 months ago
An interchange of air between the land and oceans due to unequal heating and cooling of continents and oceans is known as monsoon winds.
Our Indian economy is highly dependent on agriculture and our agriculture is dependent on the monsoon rains every year. In case the monsoon is favorable then we have a positive impact in our economy. The crops grown in different part of the country are largely dependent on the amount of rainfall in these respective areas. Indian economy is largely dependent on the wills of the nature and every year there is an uncertainty. If the monsoon fails over a wider part of the country then the result will be famine.
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Gaurav Seth 5 years, 10 months ago
Continental shelf:
i. The continental shelf is the extended margin of each continent occupied by relatively shallow seas and gulfs. It is the
shallowest part of the ocean showing an average gradient of 1° or even less.
ii. The shelf typically ends at a very steep slope, called the shelf break. The width of the continental shelves vary from
one ocean to another.
iii. The average width of continental shelves is about 80 km. The shelves are almost absent or very narrow along some of
the margins like the coasts of Chile, the west coast of Sumatra, etc.
iv. On the contrary, the Siberian shelf in the Arctic Ocean, the largest in the world, stretches to 1,500 km in width. The
depth of the shelves also varies. It may be as shallow as 30 m in some areas while in some areas it is as deep as 600 m.
v. The continental shelves are covered with variable thicknesses of sediments brought down by rivers, glaciers, wind,
from the land and distributed by waves and currents. Massive sedimentary deposits received over a long time by the
continental shelves, become the source of fossil fuels.
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Yogita Ingle 5 years, 10 months ago
| Waves | Currents |
| Formed due to the forces exerted by winds on the water surface | Formed as a result of temperature differences on oceanic surfaces |
| Waves are defined as the energy that moves across the surface of the water | Currents are defined as the direction of flow of a body of water |
| The intensity of waves are influenced by wind factors | The intensity of currents are influenced by winds, temperature differences in water and the oceanic surface topography |
| Waves occur regularly across bodies of water | Equatorial currents like El Nino occur every few years |
| Waves move from side to side | Currents flow clockwise in the Northern Hemisphere and counter clockwise in the Southern Hemisphere. This is known as the Coriolis Effect |
Yogita Ingle 5 years, 10 months ago
| Tides | Currents |
| Formed due to the interaction of gravitational forces between the Earth, Sun and Moon | Formed as a result of temperature differences on oceanic surfaces |
| Tides are defined as the rise and fall of the sea level | Currents are defined as the direction of flow of a body of water |
| The intensity of tides are influenced by the location and position of the Earth | The intensity of currents are influenced by winds, temperature differences in water and the oceanic surface topography |
| Tides occur twice a day | Equatorial currents like El Nino occur every few years |
| Tides move up and down | Currents flow clockwise in the Northern Hemisphere and counter clockwise in the Southern Hemisphere. This is known as the Coriolis Effect. |
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Gaurav Seth 5 years, 10 months ago
Alexander Von Humboldt, a German Geographer had introduced systematic geography.
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Divya Mishra 5 years, 9 months ago
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Rekha K 5 years, 9 months ago
3Thank You