Chemistry-
General
Easy
Question
Which of the following pair of ions makes the water hard
The correct answer is:
is main reason of temporary hardness of wate
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is
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The escape velocity for a rocket from earth is 11.2kms-1 value on a planet where acceleration due to gravity is double that on earth and diameter of the planet is twice that of earth will be...km-1
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The escape velocity of a sphere of mass m from earth having mass M and Radius R is given by
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A particle falls towards earth from infinity. It's velocity reaching the earth would be……
A particle falls towards earth from infinity. It's velocity reaching the earth would be……
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Radius of orbit of satellite of earth is R. Its K.E is proportional to
Radius of orbit of satellite of earth is R. Its K.E is proportional to
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Energy required to move a body of mass m from an orbit of radius 2R to 3R is
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A body is projected vertically upwards from the surface of a planet of radius R with a velocity equal to half the escape velocity for that planet. The maximum height attained by the body is….
A body is projected vertically upwards from the surface of a planet of radius R with a velocity equal to half the escape velocity for that planet. The maximum height attained by the body is….
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The Gravitational P.E of a body of mas m at the earth's surface is -mg Re. Its gravitational potential energy at a height Re from the earth's surface will be = here (Re is the radius of the earth),
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The Gravitational P.E of a body of mas at the earth's surface is -mg Re. Its gravitational potential energy at a height Re from the earth's surface will be = here (Re is the radius of the earth),
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