Exam (elaborations)
NST1502 Assignment 4 PORTFOLIO 2024 - DUE 8 October 2024
- Course
- NST1502 (NST1502)
- Institution
- University Of South Africa
QUESTIONS WITH ANSWERS NST1502 Assignment 4 PORTFOLIO 2024 - DUE 8 October 2024
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[Date]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 Different Forms of Energy (14 marks)
1. Kinetic Energy:
Kinetic energy is the energy possessed by an object due to its motion. The
amount of kinetic energy depends on the mass and velocity of the object.
o Example: A car driving on the highway has kinetic energy due to its
movement.
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: Water stored behind a dam has gravitational potential
energy due to its elevated position.
3. Thermal Energy:
Thermal energy refers to the internal energy of an object due to the kinetic
, energy of its atoms or molecules. It is associated with the temperature of the
object.
o Example: A hot cup of coffee contains thermal energy because of the
high temperature of the liquid.
4. Chemical Energy:
Chemical energy is the energy stored in the bonds of chemical compounds,
which can be released during a chemical reaction.
o Example: The energy stored in gasoline is chemical energy, which is
released when it burns in a car engine.
5. Electrical Energy:
Electrical energy is the energy produced by the movement of electric
charges.
o Example: The electricity flowing through power lines to homes is
electrical energy.
6. Light (Radiant) Energy:
Light energy, also known as radiant energy, is energy carried by
electromagnetic waves.
o Example: Sunlight is an example of light energy, which is harnessed
by solar panels.
7. Sound Energy:
Sound energy is the energy associated with the vibration of particles in a
medium (like air, water, or solids) that produces sound.
o Example: The sound from a loudspeaker produces energy in the form
of sound waves.
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