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An object is placed at the centre of curvature of a concave mirror. Its image is formed at
The power of _____________ is expressed in terms of a magnitude on a scale called Richter scale.
The gravitational force of attraction between two bodies is ____________________ the distance between the two bodies.
Which of the following is based on the principle of nuclear fusion?
The gravitational force of attraction between two bodies is __________________ the product of their masses.
If the Distance-Time graph is a curve then it represents _______________.
The relative density of a substance is the ____.