If you were on the bus and someone sprayed pepper spray, who would feel it first? Who would smell it
last?
Why do the people closer to the spray source
smell it sooner then the people further away
from it?

Atank contains 240 liters of fluid in which 10 grams of salt is dissolved. brine containing 1 gram of salt per liter is then pumped into the tank at a rate of 6 l/min; the well-mixed solution is pumped out at the same rate. find the number a(t) of grams of salt in the tank at time t.

How many neutrons does a atom of cobalt have?

What must occur for air masses to form fronts