Thermo/Waves Exam

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases). It occurs when warmer areas of a liquid or gas rise and cooler areas sink, creating a circulation pattern.

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials. It occurs when heat is transferred from one molecule to another without the movement of the material as a whole.

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves. It does not require a medium to travel through, allowing heat to be transferred through the vacuum of space.

Front

What is frequency in the context of waves?

Back

Frequency is the number of wave cycles that pass a given point in one second, measured in Hertz (Hz). It determines how often the wave oscillates.

Front

What is wavelength?

Back

Wavelength is the distance between two consecutive points of a wave that are in phase, such as crest to crest or trough to trough.

Front

What is amplitude?

Back

Amplitude is the maximum displacement of points on a wave from its rest position. It is related to the energy of the wave; higher amplitude means more energy.

Front

What is the first law of thermodynamics?

Back

The first law of thermodynamics states that energy cannot be created or destroyed, only transformed from one form to another. In a closed system, the total energy remains constant.

Front

How does nuclear fusion occur in stars?

Back

Nuclear fusion in stars occurs when hydrogen nuclei combine under extreme pressure and temperature to form helium, releasing energy in the process.

Front

What is the relationship between wave speed, frequency, and wavelength?

Back

The relationship is given by the equation: Wave Speed = Frequency x Wavelength. This means that if the frequency increases, the wavelength decreases, and vice versa.

Front

What is the significance of the core of a star?

Back

The core of a star is where nuclear fusion occurs, producing energy that powers the star and contributes to its luminosity.