What is the height of the column of liquid in a barometer at 20°C when the atmospheric pressure corresponds to 760 mm of mercury?
Final answer: The height of the column of liquid in a barometer at 20°C, when the atmospheric pressure corresponds to 760 mm of mercury, is 760 cm. Therefore the correct answer is option d.
Explanation
The atmospheric pressure at sea level corresponds to the pressure exerted by a column of mercury that is about 760 mm high. The density of mercury is 13.6 g/cm³. To calculate the height of the column of liquid in a barometer at 20°C, we can use the formula:
Height = Pressure / Density / Acceleration due to gravity
Substituting the values, we have:
Height = (760 mm Hg) / (13.6 g/cm³) / (9.8 m/s²) = 55.15 cm
Therefore, the correct answer is d. 760 cm.