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A spherical body of radius R consists of a fluid of constant density and is in equilibrium under its own gravity. If P ( r ) is the pressure at r ( r < R), then the correct option(s) is (are)
06
Oct
A spherical body of radius R consists of a fluid of constant density and is in equilibrium under its own gravity. If P ( r ) is the pressure at r ( r < R), then the correct option(s) is (are) A spherical body of radius R consists of a fluid of constant density and [...]
From a point q the length of the tangent to a circle is 24cm and the distance of q from the centre is 25cm .The radius of the circle is
06
Oct
From a point q the length of the tangent to a circle is 24cm and the distance of q from the centre is 25cm .The radius of the circle is From a point q the length of the tangent to a circle is 24cm and the distance of q from the centre is 25cm .The [...]
Draw a circle and two lines parallel to a given line that one is a tangent and the other, a secant to the circle
06
Oct
Draw a circle and two lines parallel to a given line that one is a tangent and the other, a secant to the circle a secant to the circle Draw a circle and two lines parallel to a given line that one is a tangent and the other October 6, 2020 Category: Chapter 10 - [...]
Two bodies, each of mass M, are kept fixed with a separation 2L. A particle of mass m is projected from the midpoint of the line joining their cehntres, perpendicualr to the line. The gravitational constant is G. The correct statement (s) is (are)
06
Oct
Two bodies, each of mass M, are kept fixed with a separation 2L. A particle of mass m is projected from the midpoint of the line joining their cehntres, perpendicualr to the line. The gravitational constant is G. The correct statement (s) is (are) are kept fixed with a separation 2L. A particle of mass [...]
Two spherical planets P and Q have the same uniform density ρ, masses Mp and MQ and surface areas A and 4A respectively. A spherical planet R also has uniform density ρ and its mass is (MP+MQ). The escape velocities from the planets P, Q and R are VP VQ and VR respectively. Then
06
Oct
Two spherical planets P and Q have the same uniform density ρ, masses Mp and MQ and surface areas A and 4A respectively. A spherical planet R also has uniform density ρ and its mass is (MP+MQ). The escape velocities from the planets P, Q and R are VP VQ and VR respectively. Then masses [...]
A rocket is launched normal to the surface of the earth, away from the sun, along the line joining the sun and the earth. The sun is 3 × 10^5 times heavier than the earth and is at a distance 2.5 × 10^4 times larger than the radius of the earth. the escape velocity from earth’s gravitational field is ue = 11.2 m/s. The minimum initial velocity (ue) = 11.2 m/s. the minimum initial velocity (us) required for the rocket to be able to leave the sun-earth system is closest to (Ignore the rotation of the earth and the presence of any other planet
06
Oct
A rocket is launched normal to the surface of the earth, away from the sun, along the line joining the sun and the earth. The sun is 3 × 10^5 times heavier than the earth and is at a distance 2.5 × 10^4 times larger than the radius of the earth. the escape velocity from [...]
A planet of radius R = 1/10×( radius of Earth ) has the same mass density as Earth. Scientists dig a well of depth R/5 on it and lower a wire of the same length and a linear mass density 10^−3 kg m(_1) into it. If the wire is not touching anywhere, the force applied at the top of the wire by a person holding it inplace is (take the radius of Earth = 6 × 10^6 m and the acceleration due to gravity on Earth is 10 m/s^2
06
Oct
A planet of radius R = 1/10×( radius of Earth ) has the same mass density as Earth. Scientists dig a well of depth R/5 on it and lower a wire of the same length and a linear mass density 10^−3 kg m(_1) into it. If the wire is not touching anywhere, the force applied [...]
A thin uniform annular disc ( see figure) of mass M has an outer radius 4 R and inner radius 3 R. The work required to take a unit mass from point P on its axis to infinity is
06
Oct
A thin uniform annular disc ( see figure) of mass M has an outer radius 4 R and inner radius 3 R. The work required to take a unit mass from point P on its axis to infinity is A thin uniform annular disc ( see figure) of mass M has an outer radius 4 [...]
A satellite is moving with a constant speed ‘V’ in a circular orbit about the earth. An object of mass ‘m’ is ejected from the satellite such that it just escapes form the gravitational pull of the earth. At the tme of its ejection, the kinetic energy of the object is
06
Oct
A satellite is moving with a constant speed ‘V’ in a circular orbit about the earth. An object of mass ‘m’ is ejected from the satellite such that it just escapes form the gravitational pull of the earth. At the tme of its ejection, the kinetic energy of the object is each of mass M [...]
The variation of acceleration due to gravity g with distance d from centre of the earth is best represented by ( R = earth’s radius )
06
Oct
The variation of acceleration due to gravity g with distance d from centre of the earth is best represented by ( R = earth’s radius ) The variation of acceleration due to gravity g with distance d from centre of the earth is best represented by ( R = earth's radius ) October 6, 2020 [...]