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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.

Find the mass in grams of 1.37x1020 particles of h3po4

Is a pencil falling to the floor anon contact force, a force, or a contact force