Assignment 3 2025
(Answer Guide) -
Due 26 July 2025
QUESTIONS WITH 100%
VERIFIED AND
CERTIFIED ANSWERS.
, 1|Page
NST2601 Assignment 3 2025 (Answer Guide) - Due 26 July 2025
VERIFIED AND CERTIFIED ANSWERS. WRITTEN IN REQUIRED FORMAT AND WITHIN
GIVEN GUIDELINES. IT IS GOOD TO USE AS A GUIDE AND FOR REFERENCE, NEVER
PLAGARIZE. Thank you and success in your academics.
UNISA, 2025
Contents
QUESTION 1 [30 MARKS] ...................................................................................................................... 2
1.1 Define the following: (20) ............................................................................................................ 2
a. Particle ............................................................................................................................................. 2
b. Atomic model .................................................................................................................................. 2
c. Subatomic ....................................................................................................................................... 2
d. Protons ............................................................................................................................................ 2
e. Neutrons .......................................................................................................................................... 2
f. Electron configuration..................................................................................................................... 3
g. Energy ............................................................................................................................................. 3
h. Energy system ................................................................................................................................ 3
i. Electrical system ............................................................................................................................. 4
j. Thermal energy ............................................................................................................................... 4
1.2 Explain the main source of energy. (10).................................................................................. 4
QUESTION 2 [40 MARKS] ...................................................................................................................... 5
2.1 Differentiate between renewable and non-renewable resources. (10) ............................ 5
2.2 Demonstrate Fleming’s left-hand rule. (10) ............................................................................ 6
2.3 Discuss: ........................................................................................................................................... 7
a. Electromagnetic Radiation (10) ................................................................................................... 7
b. Thermal Energy Radiation (10).................................................................................................... 8
REFERENCE LIST .................................................................................................................................... 9