About an hour About a day  About a week About a month About forever slide 0

About an hour About a day About a week About a month About forever

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0 of 250. 30. You have a piano, and you ask for the best piano tuner EVER. You ask her to tune the piano perfectly. She says No problem, it will only take. About an hour About a day About a week About a month About forever. 0 of 250. 30. - PowerPoint PPT Presentation

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You have a piano, and you ask for the best piano tuner EVER. You ask her to tune the piano perfectly. She says No problem, it will only take...About an hourAbout a day About a weekAbout a monthAbout foreverThe speed of a photon in vacuum is known precisely in all circumstances. It follows from the uncertainty principle that nothing can be known about the photons postion.TrueFalseFalse, but because the speed is not really known preciselyA free electron moves along the x-axis, and has a localized wave function. The uncertainty in its momentum is decreased if:The wave function is made more narrowThe wave function is made less narrowWave function is unchanged, but its energy is increasedWave function is unchanged, but its energy is decreasedNone of the above