Máquinas térmicas - 7º ano

What is the primary function of thermal machines?

• To convert mechanical energy into electrical energy.

• To convert internal energy from a combustible material into mechanical energy.

• To convert electrical energy into thermal energy.

• To convert light energy into sound energy.

What type of energy is associated with movement in the context of thermal machines?

• Thermal energy

• Electrical energy

• Mechanical energy

• Chemical energy

Which historical event significantly increased the demand for thermal machines for large-scale production and transportation?

• The Renaissance

• The Agricultural Revolution

• The Industrial Revolution

• The Digital Revolution

Você está gostando da videoaula?

• Sim

• Não

What is an example of a thermal machine that became crucial for transportation during the Industrial Revolution?

• A smartphone

• A steam engine

• A bicycle

• A wind turbine

What is the role of steam in a steam engine?

• It cools down the engine.

• It lubricates the moving parts.

• It pushes the piston to generate mechanical movement.

• It acts as a fuel source.

What type of energy conversion is characteristic of thermal machines?

• Mechanical energy into electrical energy.

• Chemical energy into light energy.

• Thermal energy into mechanical energy.

• Electrical energy into thermal energy.

What happens to the steam after it has performed work in a thermal machine like a steam engine?

• It is released into the atmosphere and lost.

• It condenses back into water to be reused.

• It is chemically transformed into a different substance.

• It is stored as potential energy.

Which common household item is presented as an example of a thermal machine?

• A microwave oven.

• A pressure cooker.

• A toaster.

• A refrigerator.

A física faz parte do seu dia-a-dia?

• Sim

• Não

• Não sei dizer