Physics

#### Which one of following statements regarding artificial satellite of earth is incorrect,

PhysicsGeneral

- The orbital velocity depends on the mass of the satellite
- A minimum velocity of 8kms
^{-1} is required by a satellite to orbit quite close to the earth. - The period of revolution is large if the radius of its orbit is large,
- The height of geostationary satellite is about 36000 km from earth

^{-1}is required by a satellite to orbit quite close to the earth.#### Answer:The correct answer is: The orbital velocity depends on the mass of the satellite

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Orbital velocity of earth’s satellite near the surface is 7kms^{-1}. when the radius of orbit is 4 times that of earth's radius, then orbital velocity in that orbit is....kms^{-1}

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#### Magnetic moment of Cr (Z = 24), Mn^{+} (Z = 25) and Fe^{2+} (Z = 26) are a,b,c. They are in the order:

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\Fe

The correct order is :

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^{2+}ion (four) are less than in Mn^{2+}ion (five)\Fe

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^{2+}< Cr^{2+}< Fe^{2+ }< Mn^{2+}#### Which of the following arrangements does not represent the correct order of the property stated against it?

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The unpaired electrons in Fe

\Fe

The correct order is :

V

^{2+}ion (four) are less than in Mn^{2+}ion (five)\Fe

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#### A student was asked to prove a statement by induction. He proved

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On the basis of this, he could conclude that P(n) is true

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On the basis of this, he could conclude that P(n) is true

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#### If , then is equal to

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Given,

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#### If the gravitational force between two objects were proportional to (and not as )where R is separation between them, then a particle in circular orbit under such a force would have, its orbital speed v proportional to

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#### A conical vessel of height 10ft and semivertical angle is full of water. If empties in such away that the height at the water in the vessel is decreasing at a constant rate of 1ft/min. Then the rate at which the volume of water in the vessel is decreasing when its height is 6ft. is

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