Depth of a Submarine The pressure, P, in pounds per square

Chapter 6, Problem 6.1.124

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Depth of a Submarine The pressure, P, in pounds per square inch (psi) exerted on an object x ft below the sea is given by the formula P = 14.70 + 0.43x. The 14.70 represents the weight in pounds of the column of air (from sea level to the top of the atmosphere) standing over a 1 in. by 1 in. square of seawater. The 0.43x represents the weight in pounds of a column of water 1 in. by 1 in. by x ft (see Fig. 6.1). This column of air weighs 14.7 lb This column of water weighs 0.43x lb 1 in. by 1 in. square x ft Figure 6.1 a) A submarine is built to withstand a pressure of 148 psi. How deep can that submarine go? b) If the pressure gauge in the submarine registers a pressure of 128.65 psi, how deep is the submarine? 75. a) Gender Ratios If the ratio of males to females in a class is 2 : 3, what is the ratio of males to all the students in the class? b) If the ratio of males to females in a class is m : n, what is the ratio of males to all the students in the class?