Movement, Thermal Energy and Dilatation

These flashcards cover key terms and concepts related to thermal energy, dilatation, and Brownian motion, as discussed in the lecture.

Brownian Motion

The random motion observed in particles within a fluid medium due to collisions with the fluid's molecules.

Thermal Potential

The transfer of internal energy from one body or system to another due to a temperature difference, achieving thermal equilibrium.

Internal Energy

The total microscopic energy within a system, consisting of the sum of the internal kinetic energies of its constituent particles.

Thermal Expansion

The increase in length, volume, or other metric dimension of a physical body due to temperature increase.

Linear Expansion

The increase in length of a physical body due to an increase in temperature.

Coefficient of Linear Expansion

A measure of how much a material expands per unit length for each degree increase in temperature.

Surface Expansion

The increase in area of a physical body due to an increase in temperature.

Volumetric Expansion

The increase in volume of a substance due to an increase in temperature.

Irregular Expansion of Water

A property where water expands when frozen, contrary to most substances that contract upon cooling.

Thermal Contraction

The decrease in dimensions of a material caused by a decrease in temperature.