PHY3703
ASSIGNMENT 1
FULL SOLUTIONS
COMPLETE SOLUTIONS
MEMORANDUM
UNISA
2026
Page 1 of 8
, SOLUTION
(a) Temperature is a measure of the average kinetic energy of the particles (atoms or
molecules) in a substance.
It tells us how hot or cold something is relative to a reference scale (Celsius, Kelvin,
Fahrenheit).
In thermal physics, temperature determines the direction of heat flow: energy flows from
higher temperature to lower temperature until thermal equilibrium is reached.
Page 2 of 8
ASSIGNMENT 1
FULL SOLUTIONS
COMPLETE SOLUTIONS
MEMORANDUM
UNISA
2026
Page 1 of 8
, SOLUTION
(a) Temperature is a measure of the average kinetic energy of the particles (atoms or
molecules) in a substance.
It tells us how hot or cold something is relative to a reference scale (Celsius, Kelvin,
Fahrenheit).
In thermal physics, temperature determines the direction of heat flow: energy flows from
higher temperature to lower temperature until thermal equilibrium is reached.
Page 2 of 8