Exam (elaborations)
NST1502 Assignment 4 PORTFOLIO 2024 - DUE 8 October 2024
- Course
- NST1502 (NST1502)
- Institution
- University Of South Africa (Unisa)
NST1502 Assignment 4 PORTFOLIO 2024 - DUE 8 October 2024 QUESTIONS WITH ANSWERS
[Show more]
Content preview
NST1502 Assignment 4PORTFOLIO 2024 - DUE 8
October 2024
[Company address]
,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 Forms of Energy
1. Kinetic Energy
Kinetic energy is the energy an object possesses due to its motion. The faster an
object moves, the more kinetic energy it has. It is calculated using the formula
KE=12mv2KE = \frac{1}{2} mv^2KE=21mv2, where mmm is mass and vvv is
velocity.
Example: A moving car has kinetic energy, which increases with its speed.
2. Potential Energy
Potential energy is the energy stored in an object due to its position or
configuration. Gravitational potential energy depends on an object's height above
the ground and is given by PE=mghPE = mghPE=mgh, where mmm is mass,
ggg is gravity, and hhh is height.
, Example: A rock at the top of a hill has potential energy due to its elevated
position.
3. Thermal Energy
Thermal energy is the total internal energy of an object due to the kinetic energy
of its atoms and molecules. The higher the temperature, the more thermal energy
it contains.
Example: A hot cup of coffee contains thermal energy that can be transferred as
heat to its surroundings.
4. Chemical Energy
Chemical energy is stored in the bonds between atoms and molecules. It is
released or absorbed during chemical reactions.
Example: The energy stored in gasoline is chemical energy, which is released
during combustion in a car engine.
5. Electrical Energy
Electrical energy is the energy carried by the movement of electrons in an
electric circuit. It powers many devices and appliances.
Example: The electricity that powers a light bulb comes from electrical energy
generated in power plants.
6. Light Energy
Light energy, or radiant energy, is electromagnetic energy that travels in waves. It
is visible to the human eye in the form of light.
Example: Sunlight is a form of light energy that is essential for life on Earth.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through EFT, credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller mpumeleloh. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for R50,00. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
53022 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy summaries for 14 years now