Thermodynamics Flashcard

Front

What is radiation in the context of thermodynamics?

Back

Radiation is the transfer of energy through electromagnetic waves, primarily from the sun to the Earth.

Front

What is conduction?

Back

Conduction is the transfer of heat through a material without the movement of the material itself, typically occurring in solids.

Front

Why are plastic handles used for kitchen utensils?

Back

Plastic handles are used because plastic is a good insulator, preventing heat transfer to the user's hand.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion, calculated as 1/2 mv², where m is mass and v is velocity.

Front

What does R-value represent in insulation?

Back

R-value measures the thermal resistance of insulation; higher R-value indicates better insulating properties.

Front

What is the difference between R-value and U-value?

Back

R-value measures insulation effectiveness (higher is better), while U-value measures heat transfer through a building element (lower is better).

Front

What is the primary method of heat transfer from the sun to the Earth?

Back

The primary method of heat transfer from the sun to the Earth is radiation.

Front

What is an example of conduction in everyday life?

Back

An example of conduction is the heat transfer from a stove top to a pot of water placed on it.

Front

What is potential energy?

Back

Potential energy is the stored energy of an object due to its position or state, such as a rock at the top of a hill.

Front

How does increasing the R-value affect a house's insulation?

Back

Increasing the R-value improves a house's insulation by reducing heat loss, making it more energy-efficient.