Answer :
The milligrams (mg) of the radioactive substance in a 1.5 m^3 reservoir of water, given a parts per million (ppm) reading of 4.5, can be calculated as follows: (4.5 ppm * 1.5 m^3) / 1000000 = 0.00675 mg.
If the parts per million (ppm) reading is 4.5 in a 1.5 m^3 reservoir of water, we can determine the milligrams (mg) of the radioactive substance present.
To calculate this, we multiply the ppm value by the volume of the reservoir and divide by one million. In this case, the calculation is (4.5 ppm * 1.5 m^3) / 1000000, resulting in 0.00675 mg of the radioactive substance. This calculation allows us to quantify the mass of the substance based on its concentration in the water reservoir.
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