- What is the lowest prime number?

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Tom are four times the age of his son. After 6 years, the sum of their ages is 52 years. Find the present age of his son? How many liters are needed to react with 155 g of hydrogen? For a scuba diving sac rate, is it possible to solve without time? I know the psi used and what it started with, the tank volume, and depth? Ching langoug? How much pounds of force does it take to launch a 51 pound object 12 feet into the air?