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Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.
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Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies.
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The earth remains in orbit around the sun due to the force of gravity. how does the force of gravity exerted by the sun on the earth compare to the force of gravity exerted by the earth on the sun?
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While the change in blank will remain the same during a collision, the force needed to bring an object to a stop can be blank if the time if collision is blank
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Compare mass and mass number....
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