Exploring Materials and Mechanical Devices

Which of the following materials is known for its excellent thermal conductivity and is often used in cookware?

• Stainless steel

• Copper

• Plastic

• Wood

What type of lever is a seesaw, where the fulcrum is located between the effort and the load?

• First-class lever

• Second-class lever

• Third-class lever

• Fourth-class lever

Which of the following is an example of an input device in a technological system?

• Light bulb

• Microphone

• Speaker

• Motor

Which of the following is a common method for storing energy in a portable electronic device?

• Solar panel

• Lithium-ion battery

• Wind turbine

• Hydroelectric dam

What is a characteristic of smart materials?

• They are always transparent.

• They change properties in response to external stimuli.

• They are only used in construction.

• They are biodegradable.

Which of the following is considered a modern material?

• Wood

• Concrete

• Graphene

• Iron

What is the primary function of a lever in a mechanical device?

• To store energy

• To amplify force

• To generate electricity

• To conduct heat

Which material is known for its high resistance to corrosion and is often used in marine environments?

• Aluminium

• Stainless steel

• Copper

• Brass

Which of the following is an example of a smart material?

• Shape memory alloy

• Stainless steel

• Polyethylene

• Cast iron

What is the main advantage of using modern materials in design and technology?

• They are cheaper than traditional materials.

• They offer enhanced performance and functionality.

• They are easier to recycle.

• They are always lighter than traditional materials.