Semester 1 Finals

Front

What is the vapor produced by a boiling liquid that drives turbines?

Back

Steam

Front

What do rough surfaces have more of compared to smooth surfaces?

Back

More microwelds

Front

What materials are needed to create an electromagnet?

Back

Battery, coil of wire, iron core

Front

Which material is commonly used as the core in an electromagnet?

Back

Iron

Front

What type of energy is derived from steam or hot water produced from underground rocks?

Back

Geothermal energy

Front

Define steam in the context of energy production.

Back

Steam is the vapor produced when water boils, used to drive turbines for energy generation.

Front

Explain the concept of microwelds in relation to surface texture.

Back

Microwelds are tiny bonds that form between rough surfaces, increasing friction.

Front

What role does an iron core play in an electromagnet?

Back

The iron core enhances the magnetic field produced by the coil of wire.

Front

Describe geothermal energy and its source.

Back

Geothermal energy is heat energy derived from the Earth's internal heat, often harnessed from hot water or steam.

Front

What is the relationship between surface roughness and friction?

Back

Rough surfaces have more microwelds, leading to increased friction.