Ummm I’m not sure let me do the work
Answer:
The concentration downstream reduces to 0.03463mg/L
Explanation:
Initially let us calculate the time it is required to fill the lake, since for that period of time the pollutant shall remain in the lake before being flushed out.
Thus the detention period is calculated as

Now the concentration of the pollutant after 14.872 days is calculated as

where
is the initial concentration
't' is the time elapsed after which the remaining concentration is calculated
k is the dissociation constant.
Applying values we get


Answer:
7160.2812 s or 1.988 hours
Explanation:
m = Mass of person
R = Radius of Earth = 
g = Acceleration due to gravity = 9.81 m/s²
= Angular speed
Force at equator would be

Force at pole

From the question

Time period is given by

The rotational period of the planet is 7160.2812 s or 1.988 hours
The correct choice is
D. electron
mass of proton is 1.67 x 10⁻²⁷ kg and has positive charge on it.
mass of neutron is slightly greater than the mass of proton. the mass of neutron is 1.675 x 10⁻²⁷ kg and has no charge on it.
mass of electron is 9.31 x 10⁻³¹ kg
comparing the masses of electron, proton, neutron and the nucleus, we see that the mass of electron is smallest.