Physics, 13.08.2019 00:30 stephen4438
Sometimes a person cannot clearly see objects close up or far away. to correct this type of vision, bifocals are often used. the top half of the lens is used to view distant objects and the bottom half of the lens is used to view objects close to the eye. a person can clearly see objects only if they are located between 34 cm and 171 cm away from her eyes. bifocal lenses are used to correct her vision. what power lens (in diopters) should be used in the bottom half of the lens to allow her to clearly see objects 25 cm away?
Answers: 1
Physics, 22.06.2019 01:00, raweber
Avehicle has an oil leak that is causing the entire oil pan to be wet, but inspection reveals no exact source after cleaning off the oil residue. technician a says to install a fluorescent dye in the crankcase and operate the engine, then re-inspect for leaks with a special light (black light). technician b says the oil leak may be coming from a source at the top of the engine, such as a valve cover gasket. who is correct?
Answers: 1
Physics, 22.06.2019 03:30, natu2072
Using a wheel and axle, a farmer is trying to lift a bucket of water from the bottom of a well. the larger wheel has a radius of 40 cm compared to the axle that has a radius of 10 cm. if a bucket of water is 50 n, then how much effort is required to raise it? 12.5 n 200 n 2 n 500 n
Answers: 1
Physics, 22.06.2019 06:00, pinkyglitter2696
What are atoms of the same element with varying number of neutrons
Answers: 3
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