Explanation

• A barometer measures atmospheric pressure by measuring the height of a mercury column that is supported by the pressure of the surrounding air.
• The higher the mercury column, the higher the atmospheric pressure.

Explanation

• Aerosols are a type of mixture where solid particles or liquid droplets are suspended in a gas, like air.
• Examples of aerosols include mist, fog, dust, pollen, and spray cans.

Explanation

• The pressure exerted by a liquid at a given point increases with the depth of the liquid, as the weight of the liquid above increases.
• This is described by Pascal's Law, which states that the pressure at a point in a fluid is proportional to the depth of the fluid.

Explanation

• Pressure increases when Area of contact is decreased.
• This is because the same force is concentrated on a smaller area, resulting in a higher pressure (P = F/A), similar to how a sharp object can exert more pressure than a blunt object.

Explanation

• Pascal's Principle is the fundamental principle behind the operation of hydraulic systems.
• They are used in a wide range of applications, including construction equipment, brakes, lifts, and presses.
• It allows for the multiplication of force and motion, making it a crucial concept in engineering and technology.

Explanation

• Force is a vector quantity.
• It means it has both magnitude (amount of force) and direction (the way it is applied).

Explanation

• Methyl orange is a pH indicator that changes color in response to changes in acidity or basicity.
• In an acidic medium, it is orange (or red), and in a basic medium, it turns yellow.

Explanation

• Bromophenol blue is a pH indicator that changes color in response to changes in acidity or basicity.
• In an acidic medium, it is yellow, and in a basic medium, it turns blue.

Explanation

• Phenolphthalein is a pH indicator that changes color in response to changes in acidity or basicity.
• In an acidic medium, it is colorless, and in a basic medium, it turns pink.

Explanation

Ammonia has a pH level of around 11-12, which is strongly alkaline (basic).