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 4 PORTFOLIO(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 possessed by an object due to its motion.
The faster an object moves, the more kinetic energy it has.
o Example: A moving car or a flying airplane has kinetic energy due to its speed
and mass. The wind pushing a wind turbine is also an example of kinetic energy
in action.
2. Potential Energy
o Definition: Potential energy is the stored energy an object has because of its
position or state. There are various types of potential energy, such as gravitational
potential energy and elastic potential energy.
o Example: A rock at the edge of a cliff has gravitational potential energy due to its
height above the ground. Similarly, a compressed spring has elastic potential
energy.
3. Thermal Energy
o Definition: Thermal energy (or heat energy) is the energy that comes from the
movement of particles within a substance. The faster the particles move, the more
thermal energy is generated.
o Example: A hot cup of coffee contains thermal energy because the particles in the
liquid are moving rapidly. Similarly, the warmth from the sun provides thermal
energy to the Earth.
4. Chemical Energy
o Definition: Chemical energy is the potential energy stored in the bonds of
chemical compounds. This energy is released or absorbed during chemical
reactions.
o Example: The energy stored in gasoline is a form of chemical energy that powers
cars. Similarly, the energy we get from food is chemical energy stored in the food
molecules.
5. Electrical Energy
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