For a demonstration, a professor uses a razor blade to cut a thin slit in a piece of aluminum foil. when she shines a laser pointer (λ=680nm) through the slit onto a screen 5.5 m away, a diffraction pattern appears. the bright band in the center of the pattern is 8.0 cm wide. what is the width of the slit? answer in mm.
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Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?
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Abaseball is thrown from the outfield toward the catcher. when the ball reaches its highest point, which statement is true? (a)its velocity is not zero, but its acceleration is zero. (b) its velocity and its acceleration are both zero. (c) its velocity is perpendicular to its acceleration. (d) its acceleration depends on the angle at which the ball was thrown. (e) none of the above statements are true.
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When doing scientific research ,the sources used should be ?
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Which type of wave has a longer wavelength: am radio waves (with frequencies in the kilohertz range) or fm radio waves (with frequencies in the megahertz range)? explain?
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For a demonstration, a professor uses a razor blade to cut a thin slit in a piece of aluminum foil....
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