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A lens for a 35-mm camera has a focal length given by f = 47 mm.
(a) How close to the film should the lens be placed to form a sharp image of an object that is 6.2 m away?
mm
(b) What is the magnification of the image on the film?
Eratosthenes measured the circumference of the Earth by noting that the Sun is at an angle of 7°12' = 7.2° ("one-fiftieth of a circle") south of the vertical in Alexandria at the same time of day, What was Eratosthenes percent error
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q1. a 36.0 kg uniform beam is attached to a wall with the hinge while its far end is supported by a cable such that the
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One solenoid is centered inside another. The outer one has a length of 55.0cm and contains 6800 coils, Find the emf induced in the inner solenoid
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