Exam (elaborations)
NST1502 Assignment 4 PORTFOLIO 2024 - DUE 8 October 2024
- Course
- NST1502 (NST1502)
- Institution
- University Of South Africa (Unisa)
QUESTIONS WITH ANSWERS NST1502 Assignment 4 PORTFOLIO 2024 - DUE 8 October 2024
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[Company name]NST1502
Assignment 4
PORTFOLIO 2024 -
DUE 8 October 2024
QUESTIONS WITH COMPLETE ANSWERS
,NST1502 Assignment 4 PORTFOLIO 2024 - DUE 8 October 2024
QUESTION 1
Energy Basics [18 marks]
1.1 Define and explain the different forms of energy, providing real-world examples for
each. (Focus on the following forms of energy; Kinetic energy; potential energy; thermal
energy; chemical energy; electrical energy, light energy, and sound energy). (14)
1.2 Discuss the concept of energy transformation, giving examples of how one form of
energy can be converted into another. (4)
1.1 Forms of Energy
1. Kinetic Energy
Kinetic energy is the energy of motion. Any object that moves has kinetic energy.
The amount of kinetic energy depends on the object's mass and speed.
o Example: A moving car or a flowing river both have kinetic energy due to
their motion.
2. Potential Energy
Potential energy is stored energy based on an object's position or state. It has
the potential to be converted into kinetic energy.
o Example: A book held above a table has gravitational potential energy due
to its height, and a compressed spring has elastic potential energy.
3. Thermal Energy
Thermal energy, or heat energy, is related to the temperature of an object and
arises from the random movement of particles within a substance.
, o Example: Boiling water in a pot contains thermal energy due to the rapid
movement of water molecules.
4. Chemical Energy
Chemical energy is stored in the bonds between atoms in molecules. It is
released during chemical reactions.
o Example: The energy stored in food or gasoline is chemical energy,
released when the food is metabolized or gasoline burns in a car engine.
5. Electrical Energy
Electrical energy is the energy carried by moving electric charges (electrons). It
powers many devices in daily life.
o Example: A battery powering a phone or electricity flowing through power
lines.
6. Light Energy (Radiant Energy)
Light energy is a type of electromagnetic energy that travels in waves and can
move through a vacuum.
o Example: Sunlight, which provides light energy that powers
photosynthesis in plants.
7. Sound Energy
Sound energy is the energy carried by sound waves, which are vibrations that
travel through a medium such as air, water, or solids.
o Example: Music from a speaker or a person speaking both produce sound
energy as the air vibrates.
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