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Observations show that interstellar clouds can have almost any shape and
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Physics, 22.06.2019 22:50
The illuminance of a surface varies inversely with the square of its distance from the light source. if the illuminance of a surface is 120 lumens per square meter when its distance from a certain light source is 6 meters, by how many meters should the distance of the surface from the source be increased to reduce its illuminance to 30 lumens per square meter?
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Diagram 29 shows electric field lines of two charges Q, and Qz.
What are the charges of Q, and Q2?...
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