Exam (elaborations)
NST1502 Assignment 4 PORTFOLIO (COMPLETE ANSWERS) 2024 - DUE 8 October 2024
- Course
- NST1502
- Institution
- University Of South Africa
TRUSTED WORKINGS, EXPLANATIONS AND SOLUTIONS
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NST1502 Assignment 4PORTFOLIO (COMPLETE
ANSWERS) 2024 - DUE 8
October 2024
, NST1502 Assignment 4 PORTFOLIO (COMPLETE
ANSWERS) 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 Different Forms of Energy (14 marks)
1. Kinetic Energy:
o Definition: Kinetic energy is the energy an object has due to its motion. The
amount of kinetic energy depends on the object’s mass and speed.
o Example: A moving car has kinetic energy. The faster it moves, the more kinetic
energy it has.
2. Potential Energy:
o Definition: Potential energy is stored energy based on an object’s position or
configuration. It can be released to do work.
o Example: A compressed spring has potential energy that is released when it is let
go, pushing an object forward.
3. Thermal Energy (Heat Energy):
o Definition: Thermal energy is the internal energy present in a system due to the
movement of its particles. It is related to temperature.
o Example: A cup of hot coffee has thermal energy, which is transferred to the
surrounding air as the coffee cools.
4. Chemical Energy:
o Definition: Chemical energy is the energy stored in the bonds of molecules and
atoms. It is released or absorbed during chemical reactions.
o Example: Food contains chemical energy, which is converted into energy by the
human body for movement and other functions. Similarly, a battery stores
chemical energy that powers electrical devices.
5. Electrical Energy:
o Definition: Electrical energy is the energy resulting from the flow of electric
charge (electrons) through a conductor.
o Example: Electrical energy is used to power household appliances, such as a
television or refrigerator.
6. Light Energy (Radiant Energy):
o Definition: Light energy is a form of electromagnetic radiation that travels in
waves and can be seen by the human eye.
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