d. fishing
The other options all directly affect algal bloom production because they affect the nutrients in the water, and an overabundance of certain nutrients in the water is what causes algal bloom.
You haven't specified where the experiment took place. I'm going to
assume that it was somewhere on Earth. That's important.
The acceleration of gravity on or near the surface of the Earth is about 9.8 m/s² .
That means that a falling object falls 9.8 m/s faster every second.
So in 2 seconds of falling, its downward speed increases (2 x 9.8) = 19.6 m/s .
If the stone was falling at the rate of 3.0 m/s when the 2 seconds began,
then its downward speed at the end of the 2 seconds was
(3.0 m/s) + (19.6 m/s) = <em>22.6 m/s</em>
They have positive charge and are located in the nucleus with neutrons
<span>Speed (rms) = sqrt 3KT/m, where:
K = Boltzmann's costant = 1.38*10^-23 joule/K;
T = temperature in Kelvin degrees = 273 - 63 = 210 K;
m = 44 * 1.672*10^-27 Kg;
1.672*10^-27 Kg (good approximation) is the weight of a single a.m.u. (atomic mass unit);
44 is molecular weight of CO2.
Molecular Speed (CO2) = sqrt 3*1.38*10^-23*210/44*1.672*10^-27 = 344 m/sec.
Excuse me for some imperfection in my language, I am from South Italy. My cordiality to You, hello.</span>