,NST1502 Assignment 4 PORTFOLIO (COMPLETE
ANSWERS) 2024 - DUE 8 October 2024 ; 100% TRUSTED
Complete, trusted solutions and explanations.
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) QUESTION 2
Renewable and Non-Renewable Energy Sources [18 Marks] 2.1
Compare renewable and non-renewable energy sources in terms
of availability, environmental impact, and sustainability. (6) 2.2
Provide three examples of renewable and non-renewable energy
sources. (6) 2.3 Discuss three environmental impacts of
renewable and non-renewable energy sources. (6) 4
QUESTION 1: Energy Basics
1.1 Different Forms of Energy
Energy exists in several forms, each characterized by its nature
and applications. Here’s a breakdown of key forms of energy
with definitions and real-world examples:
1. Kinetic Energy
o Definition: Kinetic energy is the energy of motion.
Any object in motion, regardless of its size or speed,
possesses kinetic energy.
, o Example: A moving car has kinetic energy due to its
velocity and mass. For instance, a 1,000 kg car
traveling at 20 m/s has a kinetic energy of 200,000
joules (calculated using the formula KE = 0.5 × mass
× velocity²).
2. Potential Energy
o Definition: Potential energy is stored energy based on
an object’s position or state. It can be converted into
kinetic energy when the object is in motion.
o Example: A rock perched at the edge of a cliff has
gravitational potential energy. If the rock falls, that
potential energy converts into kinetic energy as it
accelerates toward the ground.
3. Thermal Energy
o Definition: Thermal energy is the total internal energy
of an object due to the kinetic energy of its particles,
often perceived as heat.
o Example: The heat generated by a stovetop burner
when cooking food is thermal energy. Similarly, the
thermal energy in a heated swimming pool provides
warmth to swimmers.
4. Chemical Energy
o Definition: Chemical energy is stored in the bonds of
chemical compounds and released during chemical
reactions.
o Example: Food contains chemical energy, which our
bodies convert into kinetic energy for movement.
Batteries also store chemical energy that can be
transformed into electrical energy when used.
5. Electrical Energy
