,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
Energy Basics and Energy Sources
QUESTION 1: Energy Basics [18 marks]
1.1 Different Forms of Energy (14 marks)
Energy exists in various forms, each with distinct characteristics
and real-world applications. Below are explanations of the
different forms of energy, along with examples for each.
1. Kinetic Energy:
o Definition: Kinetic energy is the energy an object
possesses due to its motion. The amount of kinetic
, energy an object has depends on its mass and velocity,
and it can be calculated using the formula
KE=12mv2KE = \frac{1}{2} mv^2KE=21mv2, where
mmm is mass and vvv is velocity.
o Example: A moving car has kinetic energy; the faster
the car moves and the heavier it is, the more kinetic
energy it possesses. A child riding a bicycle also
demonstrates kinetic energy.
2. Potential Energy:
o Definition: Potential energy is the stored energy an
object possesses due to its position or configuration. It
can take various forms, such as gravitational potential
energy, elastic potential energy, and chemical
potential energy.
o Example: A rock perched at the top of a hill has
gravitational potential energy due to its height. A
compressed spring in a toy also stores elastic potential
energy.
3. Thermal Energy:
o Definition: Thermal energy, or heat energy, is the
energy that comes from the temperature of matter. It
arises from the movement of particles within a
substance and is transferred as heat.
o Example: Boiling water on a stove has thermal
energy. The heat emitted by a fireplace or a hot cup of
coffee is another example of thermal energy.
4. Chemical Energy:
o Definition: Chemical energy is the energy stored in
the bonds of chemical compounds. It is released or
absorbed during a chemical reaction, resulting in the
transformation of substances.
