The escape velocity of a sphere of mass m is given by (G= univesal | Filo

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Class 12 Physics Mechanics Gravitation

The escape velocity of a sphere of mass m is given by (G= univesal gravitational constant,

M_{e} =

mass of the earth and

R_{e} =

radius of the earth)

(a)

\frac{G M _{e}}{R _{e}}

(b)

\frac{2 G M _{e}}{R _{e}}

(c)

\frac{2 G m}{R _{e}}

(d)

\frac{G M _{e}}{R _{e}^{2}}

Correct answer: (b)

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mechanical properties of fluids

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FIll in the blank.

When a solid floats in a liquid, the weight of _______ by its immersed part of the solid is equal to the weight of the solid.

play button image

From a solid sphere of mass M and radius R, a spherical portion of radius R/2 is removed, as shown in the figure Taking gravitational potential

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A black hole is an object whose gravitational field is so strong that even light cannot escape from it. To what approximate radius would earth (mass

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Every liquid exerts an upward force on the objects immersed in it. The upward force is called ________.

play button image

Two satellites of earth

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Submarine's lactometers, hydrometers, etc. are designed according to __________.

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Copyright FILO EDTECH PVT. LTD. 2021