Distance between eyes and the glasses
A nearsighted patient's far point is 0.612 m from her eyes. She is able to see distant objects in focus when wearing glasses with a refractive power of -1.7 diopters. What is the distance between her eyes and the glasses?
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What should be the refractive power (in diopters) of her glasses (worn 2.6 cm from the eyes), so she can read the newspaper at a distance of 25 cm from the eyes?
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A following process expands the gas at constant pressure to three times the initial volume. What is the specific work in the combined process?
There are a reservoir at point zero and another one 80 meter higher. They are 1km from eachother. The upper reservoir has a capacity of 40 000m3. The pipe diameter is 700mm.
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An ideal Brayton cycle with regeneration has a pressure ratio of 10. Air enters the compressor at 300K and the turbine at 1200K. If the effectiveness of the regenerator is 100 percent, determine the net work output and the thermal efficiency of th
How much fuel would it take to provide this much energy if all the rest energy of the fuel could be transformed to kinetic energy of the spaceship?
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