Imagine a body that is completely submerged in water, but whose depth of submergence can be varied. In which case does it experience a larger upthrust, when it is submergged deep or shallow?
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The distance of the two planets from the Sun are 1013m and 1012m, respectively. Find the ratio of time periods and speeds of the two planets.
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Does the escape speed of a body from the earth depend on (a) The mass of the body, (b) The location from where it is projected, (c) The direction of projection, (d) The height of the location from where the body is launched?
State the Archimedes principle.
A spring balance measures the weight of an object in air to be 0.1N. It shows a reading of 0.08N when the object is completely immersed in water. If the value of acceleration due to gravity is 10m/s2, the volume of the object is
The liquid in which iron can float is
Two spherical bodies of mass M and 5M & radii R & 2R respectively are released in free space with initial separation between their centres equal to 12R. If they attract each other due to gravitational force only, then the distance covered by the smallar body just before collision is
Escape velocity of a body from the surface of earth is 11.2km/sec. from the earth surface. If the mass of earth becomes double of its present mass and radius becomes half of its present radius then escape velocity will become