Astudent drops a water balloon from tall building trying to hit her roommate on the ground below (and misses). after dropping the balloon, the student ducks behind cover and hears a splash 4 seconds later. given that the speed of sound in air is 331 m/s, find the height of the building. (neglect air resistance).
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Select the correct answer. what does the process of natural selection involve?
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Examine the drawing of a molecule. each ring represents an atom of nitrogen (n). what’s the chemical formula of this substance?
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The field lines around one end of a bar magnet are shown below based on the diagram, what can you conclude about the pole of the magnet? a.is a south pole because the field hnes spread out from this end b.a north pole because the field lines spread out from this end c.a nouth pole because the field lines enter the magnet at this end d.is a north pole because the field lines enter the magnet at this end
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Find an expression for the electric field e⃗ at the center of the semicircle. hint: a small piece of arc length δs spans a small angle δθ=δs /r, where r is the radius. express your answer in terms of the variables q, l, unit vectors i^, j^, and appropriate constants.
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Astudent drops a water balloon from tall building trying to hit her roommate on the ground below (an...
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