A doctor prescribes 2 g of a drug, daily, for a patient. The pharmacist has only 500mg tablets available. How many tablets will the patient take daily?

A typical bathroom sink faucet releases about two gallons of water every minute.   a) If it takes you 2.5 minutes to brush your teeth and you leave the water run for the entire time, how much water would be used? b) If you only run the water for 30 seconds, how much water would be used?

A European automobile has gas mileage of 14.0 km/L. What is that gas mileage in miles per gallon?

the average density of an atom is approximately 103 kg/m3. The nucleus of an atom has a radius about 10-5 times that of the entire atom, and contains nearly all the mass of the atom.  What is the approximate density, in kilograms per cubic meter, of a nucleus?

A cube-shaped block of wood has a density of 750 kg/m3 and a mass of 49 kg. What is the length of any side of the wooden block in meters?

A large tank is filled to capacity with 500 gallons of pure water. Brine containing 2 pounds of salt per gallon is pumped into the tank at a rate of 5 gal/min. The well-mixed solution is pumped out at the same rate. a) Find the number A(t) of pounds of salt in the tank at time t. b) what is the concentration c(t) of the salt in the tank at time t? At t=5 min? What is the concentration of the salt in the tank after a long time (we can this concentration the limiting value), that is, as t→--? At what time is the concentration of the salt in the tank equal to one-half this limiting value? 500 gallons

A study finds that the metabolic rate of mammals is proportional to m3/4, where m is the total body mass. By what factor does the metabolic rate of a 70.0-kg human exceed that of a 6.41-kg cat?

Lawn fetrilizer contains nitrogen, Potash, phosphate, and filler in the ratio 29:3:4:64. What is the mass of nitrogen in one 8kg bag    (if possible, can you please attempt to solve this without using cross multiplication)

According to the Ideal Gas Law, PV = kT, where P is pressure, Vis volume, T is temperature (in Kelvins), and k is a constant of proportionality. A tank contains 2000 cubic inches of nitrogen at a pressure of 26 pounds per square inch and a temperature of 600 K. Determine the EXACT value of k.

a cubic box is completely filled with 1000.0 kg of water. what is the length of one side of the box, in meters?