Question

for which applications would you choose a liquid over a gas or solid? choose four correct answers.

• washing clothes
• dissolving sugar
• making a gear for a machine
• deodorizing a room
• painting a wall
• carving a sculpture
• linking a brake pedal to the brake pads at the wheels of a car

Explanation:

Analyze liquid properties

We need to identify applications where a liquid is preferred over a gas or solid. Liquids flow, take the shape of their container, are nearly incompressible, and act as excellent solvents. These properties are key to States of Matter and Properties of Fluids.

Evaluate each option

• washing clothes: Requires a fluid to flow through fabric and dissolve dirt. A liquid is ideal; a solid cannot flow, and a gas cannot dissolve dirt effectively.
• dissolving sugar: Liquids have mobile molecules with space to surround and dissolve solutes. Solids cannot dissolve substances, and gases do not act as liquid-like solvents.
• making a gear for a machine: Requires a rigid, fixed shape to withstand mechanical stress. A solid is required.
• deodorizing a room: Requires rapid diffusion to fill a large volume. A gas is preferred for spreading throughout the air.
• painting a wall: Requires a substance that flows to cover a surface evenly and then dries. A liquid is ideal.
• carving a sculpture: Requires a rigid material that holds its shape under force. A solid is required.
• linking a brake pedal to the brake pads at the wheels of a car: Requires an incompressible fluid to transmit force efficiently without compressing. A liquid (hydraulic fluid) is ideal because gases are highly compressible.

Answer:

• washing clothes (Correct answer)
• dissolving sugar (Correct answer)
• making a gear for a machine
• deodorizing a room
• painting a wall (Correct answer)
• carving a sculpture
• linking a brake pedal to the brake pads at the wheels of a car (Correct answer)