Pressure is defined as the force exerted on a unit area. In other words, it is the amount of force applied to an object per unit of surface area.
Opening a window on a box increases the surface area available for air to escape, thereby reducing the pressure inside the box. This is because the same amount of air molecules are now spread out over a larger area, resulting in a decrease in pressure.
When a box is sealed, the volume of air inside remains constant but the number of air molecules remains the same. This leads to an increase in the concentration of air molecules, causing an increase in pressure.
According to the ideal gas law, pressure and temperature are directly proportional to each other. This means that as temperature increases, so does pressure, and vice versa.
Yes, pressure can be measured using various instruments such as barometers, manometers, and gauges. The most commonly used unit for pressure is the Pascal (Pa), but other units such as atmospheres (atm) and pounds per square inch (psi) are also used.