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"A magnifying glass is a single convex lens with a focal length of f = +11.0 cm. (Assume the person using the magnifying glass has a near point of 25 cm and the magnifying glass is directly in front of the person's eyes.)
(a) What is the angular magnification when this lens forms a (virtual) image at -infinity. (I've done this one. The answer is 2.27. But I can't figure out how to do the others.)
(b) How far from the object should the lens be held?
(c) What is the angular magnification when this lens forms a (virtual) image at the person's near point?
(d) How far from the object should the lens be held in this case?
When a dog is wet, it will often dry itself by twisting violently. Why does this cause the water to leave its fur
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Neutron stars are extremely dense objects formed from the remnants of supernova explosions. Find the greatest possible angular speed it can have therefore that the matter at the surface of the star on its equator is just held in orbit by the gravit..
A frictionless incline at an angle of 40.0° with respect to the horizontal has a block of mass 50.0 kg attached by a mass less rope-pulley assembly to a mass weighing 55.0 kg hanging in the air. What is the acceleration of the mass on the incline? Wh..
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