This physics problem tests your understanding of fundamental physical laws and their applications. The step-by-step solution below breaks down the problem using relevant equations and physical reasoning.
ScanSolve AI Answer
9. Step 1: Calculate the pressure exerted by the mercury column. The pressure due to a column of fluid is given by the formula P = g h. Given: Density of mercury () = 14,000 kg/m^3 Acceleration due to gravity (g) = 10 N/kg = 10 m/s^2 Difference in height (h) = 72 m P_column = g h P_column = 14,000 kg/m^3 × 10 m/s^2 × 72 m P_column = 10,080,000 Pa Step 2: Convert the pressure to kilopascals (kPa). 1 kPa = 1000 Pa P_column = (10,080,000)/(1000) kPa P_column = 10,080 kPa Step 3: Determine the pressure of the gas supply. From the diagram, the mercury level in the arm connected to the gas supply (left side) is lower than the mercury level in the arm open to the atmosphere (right side). This indicates that the pressure of the gas supply is greater than the atmospheric pressure. P_gas = P_atm + P_column Given atmospheric pressure (P_atm) = 100 kPa. P_gas = 100 kPa + 10,080 kPa P_gas = 10,180 kPa The pressure of the gas supply is 10,180 kPa. 10. Effect on stability: His stability will increase*. Explanation: Spreading his feet further apart increases the base area (or base of support) of the athlete. For an object to be stable, its center of gravity* must fall within its base of support. A larger base area means the center of gravity can shift a greater distance horizontally before it falls outside the base, making the athlete more stable and less likely to topple over, especially when lifting heavy weights. Last free one today — make it count tomorrow, or type /upgrade for unlimited.