The question asks to identify the type of barometer that uses a column of liquid to measure atmospheric pressure. We need to recall the basic working principles of different types of barometers.
A) Mercury barometer uses a column of mercury (a liquid) in an inverted tube to measure atmospheric pressure. The height of the mercury column indicates the pressure.
This question tests knowledge about barometers and their relation to weather changes, specifically the approach of a storm. Barometers measure atmospheric pressure, and understanding how pressure changes during different weather conditions is key.
Correct Option: B) Decreases. When a storm approaches, the atmospheric pressure drops, causing the barometer reading to decrease. This is a classic indicator used in meteorology to forecast bad weather.
To find the pressure, we need to use the fundamental formula that relates pressure, force, and area. Pressure is defined as the force applied perpendicular to the surface of an object per unit area over which the force is distributed.
Pressure (\(P\)) is calculated as Force divided by Area.
\[ P = \frac{F}{A} \]The SI unit for pressure is the Pascal (Pa), where \(1 \text{ Pa} = 1 \text{ N/m}^2\).
\[ P = 50 \text{ Pa} \]Correct Option: A) 50 Pa
The question asks to identify the gas law that describes the relationship between the volume and pressure of a gas when the temperature is kept constant. We need to recall the definitions of the various gas laws.
Correct Option: A) Boyle's law
The question asks to identify units of atmospheric pressure. We need to recall the common units used to measure pressure, particularly atmospheric pressure, and check which of the given options fall into this category.
Correct Option: D) All of the above
The question asks to identify the gas law that describes the inverse relationship between the pressure and volume of a gas when its temperature is kept constant. We need to recall the definitions of the various gas laws.
Correct Option: D) Boyle's law