what is a material for pollution catcher?
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This activity is called pollution catcher. Not every form of pollution can be caught by this experiment. This is mainly for catching air pollution. This activity includes a plastic plate, a hole punch, a string, and vaseline. Now, take the plate and punch a hole on the top
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The Area enclosed between two concertic circle is 770 cm ² and outside radius R=12 cm . Calculate the radius of inner circle
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The Area enclosed between two concertic circle is 770 cm ² and outside radius R=12 cm . Calculate the radius of inner circle
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