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1- Given an object placed at a distance of 52 cm from a biconvex lens with a focal length of 24 cm. At what distance

1- Given an object placed at a distance of 52 cm from a biconvex lens with a focal length of 24 cm.

At what distance from the lens should an image be formed on the opposite side of the lens?

2- The distance from the Earth to the Moon is about 384 thousand kilometers. The speed of some runner is about 21.9 km/h. How many years does it take to get to the Moon from Earth in a direct way at the speed of this runner?

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