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Yogita Ingle 4 years, 10 months ago
Let the equation of circle be
x2+y2+2gx+2fy+c=0 .....(1)
where (−g,−f) is center and g2+f2−c is the radius.
Since, the circle passes through (2,3), so it satisfies eqn (1)
⇒4+9+4g+6f+c=0
⇒4g+6f+c=−13 .....(2)
Since, the circle passes through (−1,1), so it satisfies eqn (1)
⇒1+1−2g+2f+c=0
⇒−2g+2f+c=−2 .....(3)
Subtracting eqn (3) from eqn (2), we get
6g+4f=−11 ....(4)
Given center lies on the line x−3y−11=0
Since, center (−g,−f) satisfies this equation.
⇒−g+3f=11 ....(5)
Solving eqn (4) and (5), we get
g= −7/2 ,f= 5/2
Put this value in (2), we get
c=−14
Substituting these values in (1),
x2+y2−7x+5y−14=0
which is the equation of required circle.
Posted by Swati Mishra 4 years, 10 months ago
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Gaurav Seth 4 years, 10 months ago
Moving Air is called wind. And energy produced from Wind is called Wind Energy. Wind is caused due to unequal heating of land and water bodies by the sun. This unequal heating generates air movement and causes winds to blow. This kinetic energy of wind is used to generate wind energy from a Windmill.
Posted by Swati Mishra 4 years, 10 months ago
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Gaurav Seth 4 years, 10 months ago
- The energy obtained from the sun is called solar energy
- Sun's heat which falls on the earth can be harnessed for various heating and lighting purposes.
- Most of the sun's heat is absorbed is the atmosphere.
- Only a very small portion reaches the earth and it is this energy that can be harnessed for energy purposes.
- A black surface absorbs more heat than a white surface.
- This property is used in Solar cookers, Solar water heaters and Solar cells.
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Yogita Ingle 4 years, 10 months ago
Cellular respiration is a process that takes place inside the cells where energy is released by the breakdown of glucose molecules. The process can be conveniently divided into two categories based on the usage of oxygen, namely aerobic and anaerobic respiration.
| Aerobic Respiration | Anaerobic Respiration |
| Oxygen is present when this form of respiration takes place. | Oxygen is absent when this form of respiration takes place. |
| Gases are exchanged in this form of respiration. | Gases are not exchanged in this form of respiration. |
| It can be found in the cytoplasm and the mitochondria. | It can be found only in the cytoplasm. |
| Glucose breaks down into carbon dioxide and water. | Glucose breaks down into ethyl alcohol, carbon dioxide and energy. |
| All higher organisms such as mammals have this type of respiration. | Lower organisms such as bacteria and yeast use this type. In other organisms, it occurs during heavy activities. |
Posted by Tejas And Roopam Mishra 4 years, 10 months ago
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Vedika Tayal 3 years, 7 months ago
Yogita Ingle 4 years, 10 months ago
There are eight bones that surround your brain: one frontal bone; two parietal bones, two temporal bones, one occipital bone, one sphenoid bone and one ethmoid bone.
Gaurav Seth 4 years, 10 months ago
eight bones
There are eight bones that surround your brain: one frontal bone; two parietal bones, two temporal bones, one occipital bone, one sphenoid bone and one ethmoid bone. These eight bones make up the cranium. Another 14 bones in the face make up the entire skull.
Posted by Samrat Ghosh 4 years, 10 months ago
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Anuj Study Panel 4 years, 3 months ago
Yogita Ingle 4 years, 10 months ago
Respiration is a very special form of burning fuel. It involves the burning of sugar with oxygen within the cells of every living organism, to produce the energy needed for all the reactions of life along with water and carbon dioxide as waste products. Respiration is another exothermic reaction.
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Gaurav Seth 4 years, 10 months ago
Politics is an important and integral part of society for the following reasons:
1. The presence of some kind of government is essential to maintain the law and order in society, the lack of which can result in the destruction of society.
2. Government is required in any society because it can control the social suppression of the poor by the rich section of the society.
3. It is required to establish harmony in a society or civilization.
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