if the discharge of a river is 4m^3/s
and its concentration is 4ppm of mercury
how much mercury is being brought in everyday?
To find out how much mercury is being brought in every day, we need to calculate the total amount of mercury in the river's discharge per day.
First, let's determine the volume of water discharged per day. Since the river's discharge is given as 4 m^3/s, we can convert it to m^3/hour and then to m^3/day.
1 day = 24 hours
1 hour = 60 minutes
1 minute = 60 seconds
So, the volume of water discharged per day is:
4 m^3/s * 60 s/min * 60 min/hour * 24 hours/day = 34,560 m^3/day
Next, we need to calculate the total amount of mercury in the river's discharge. The concentration of mercury is given as 4 ppm (parts per million). This means there are 4 parts of mercury for every 1 million parts of water.
To calculate the amount of mercury in the river's discharge per day, we multiply the volume of water discharged per day by the concentration of mercury:
(34,560 m^3/day) * (4 ppm) = 138,240 grams/day
Therefore, the river is bringing in 138,240 grams (or 138.24 kilograms) of mercury every day.