Virtual image created by the magnifying glass
A magnifying glass creates a virtual image of the observed object. Explain how it is possible, that humans can see the virtual images. The virtual image created by the magnifying glass is one example of such images.
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A piston cylinder system stores 15 kg of water that is initially at 120 degrees Celsius, with 0.25 quality. A two step process occurs, such that the final state has a pressure of 300 KPa.
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How much work is done to bring this wheel from rest to a speed of 120 rpm in a time interval of 34.2 s?
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