NATURAL SCIENCE AND TECHNOLOGY FOR THE CLASSROOM 2 (NST1502)
Examen
NST1502 Assignment 4 (Portfolio) 2024 | Due 8 October 2024
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NATURAL SCIENCE AND TECHNOLOGY FOR THE CLASSROOM 2 (NST1502)
Institución
University Of South Africa (Unisa)
NST1502 Assignment 4 (Portfolio) 2024 | Due 8 October 2024. All questions answered.
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; ther...
NATURAL SCIENCE AND TECHNOLOGY FOR THE CLASSROOM 2 (NST1502)
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Question 1 - Energy Basics
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).
Different Forms of Energy and Real-World Examples
Kinetic Energy: This is the energy an object possesses due to its motion. The faster an object
moves, the more kinetic energy it has. Example: A moving car or a running athlete.
Potential Energy: Energy stored in an object due to its position or state. It has the potential to
do work. Example: A book on a shelf (gravitational potential energy) or a compressed spring
(elastic potential energy).
Thermal Energy: Energy related to the temperature of an object, which is the total kinetic
energy of particles within the object. Example: Boiling water on a stove, where heat energy
causes water molecules to move faster.
Chemical Energy: This energy is stored in the bonds of chemical compounds and is released
during chemical reactions. Example: The energy stored in food that our body converts to
energy, or gasoline burning in a car engine.
Electrical Energy: The energy of moving electric charges. It powers most modern devices.
Example: Electricity powering a lightbulb or a computer.
Light Energy (Radiant Energy): Energy in the form of electromagnetic waves. Light energy
is visible and can travel through space. Example: Sunlight or light from a bulb.
Sound Energy: Energy carried by sound waves. It is produced when a force causes an object
to vibrate, creating waves that travel through a medium (like air). Example: The sound from a
musical instrument or a person talking.
[OR]
Energy is a fundamental concept in science and everyday life. It exists in different forms and can be
transformed from one form to another. In its various manifestations, energy powers the processes
that drive everything from natural phenomena to human-made machines. Understanding the different
types of energy is essential in grasping how the world operates on both microscopic and macroscopic
scales. This discussion will explore and explain the main forms of energy, providing real-world
examples for each: kinetic energy, potential energy, thermal energy, chemical energy, electrical
energy, light energy, and sound energy.
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