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The objective and the eyepiece of a microscope have focal lengths of 4.00 mm and 25.0 mm,respectively.The objective produces a real image 30 times the size of the object.The final image is viewed at infinity,and the near point of the microscope user is at 25.0 cm.What is the distance between the object and the focal point of the objective?
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The introduction of harmful substances or products into the environment, causing adverse effects on living organisms and ecosystems.
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A product or service that is provided without profit to all members of a society, either freely or by the government, and which is non-excludable and non-rivalrous.
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