Why do some scientists prefer to express concentrations of water contaminants in the units ppm and ppb rather than molarity?
1 answer:
Explanation:
These molarity units are used to express very small solute concentrations. Molarity cannot be used to express small amount of solute dissolved in solvents.
parts per million ppm is a dimensionless quantity that represents the part of a whole number in units of
parts per billion ppb represents the part of a whole in units of
These quantities are useful in determining very small amount of solute like gold concentration in stream sediments.
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Answer:
The energy of a wave is inversely proportional to the wavelength of the wave.
As wavelength increases, the energy of the wave decreases.
As wavelength decreases, the energy of the wave increases.
Explanation:
The energy of a wave is directly proportional to the wave's frequency. As frequency increases, so does the energy of the wave.
(energy
is proportional to frequency
)
<u>How is this related to wavelength?</u>
Frequency is inversely proportional to wavelength. That means that as frequency increases, wavelength decreases and as frequency decreases, wavelength increases.
(frequency
is inversely proportional to wavelength
)
Therefore, as wavelength increases, the energy of a wave decreases and as wavelength decreases, the energy of a wave increases.
The volume of cylinder is 100 mL, inner diameter is 3.2 cm thus, radius will be:
Volume of layer formed=...... (1)
Volume of layer is also equal to sum of volume of gasoline and water.
Density of gasoline is and mass is 34 g thus, volume of gasoline will be:
Now, density of water is and mass is 34 g thus, volume of water will be:
Adding both the volumes, volume of layer will be:
Putting the values in equation (1) to solve for height of the layer,
Thus, height of layer is 10.25 cm