week 4 reflection-- Jun Rong

This week our class was away for sec2 camp thus we did not have any IPW lessons.
We managed to meet up at yong hwa house to carry out this week assignment.

Worksheet 4

(1) What are the materials needed to built the boat?

(2) How do we prevent the boat from sinking?

(3) What is the maximum pressure on the ship before it feels

strained?

(4) The amount of force/electricity needed to be generated.

(B) The areas that our group will be doing research into are:

(1) Types of turbines and the material used

(2) Concept of Hydroelectricity (Formulae to calculate it)

(3) Concept of Kinetic Energy

(4) Structure and material of the boat

(C) Our Progress, so far, is as follows:

All 4 of us have researched on the above areas and will be putting our findings on the blog. When this is done, all 4 members will view each other’s research and study it.

(D) The product that we are thinking of creating is as follows:

A hydro electrical powerboat.

week 4 reflection--yonghwa

This week, our group was away at camp, and missed our IPW lesson. We managed to meet up at my house to carry on this week's assignment.

This is Worksheet 4

(A) The Guiding Questions that our group has selected to do research on are:
(1) What are the materials needed to built the boat?
(2) How do we prevent the boat from sinking?
(3) What is the maximum pressure on the ship before it feels
strained?
(4) The amount of force/electricity needed to be generated.

(B) The areas that our group will be doing research into are:
(1) Types of turbines and the material used
(2) Concept of Hydroelectricity (Formulae to calculate it)
(3) Concept of Kinetic Energy
(4) Structure and material of the boat

(C) Our Progress, so far, is as follows:
All 4 of us have researched on the above areas and will be putting our findings on the blog. When this is done, all 4 members will view each other’s research and study it.
(D) The product that we are thinking of creating is as follows:
A hydro electrical powerboat.

Week 4 Reflection--Jun Jie

Due to our secondary 2 adventure camp this week, we missed our IPW period. However, we still managed to meet up just yesterday to discuss on the 4 main points of research/guiding questions. They are as follow:

1) What are the materials needed to built the boat?

2) How do we prevent the boat from sinking?

3) What is the maximum pressure on the ship before it feels strained?

4) The amount of force/electricity needed to be generated.

However, we also have other important sub-research questions, such as:

1) How to connect the turbine without using wires?

2) How are we going to find out the amount of electricity needed?

3) How are we going to counter the irregular frequency of the flow of water?

4) What are the properties of different turbines?

5) What are the standard rules for building the ship?

6) What are the factors that put pressure on the hull?

Therefore, the main 4 research questions are already split equally among the 4 of us (1 person research on 1 question). As for the sub-research questions, we believe that while searching on the main 4 questions, we will also be able to find the answer to these questions.

Worksheet 4

week 3 reflection- yonghwa

Some questions that are going around in my head :What is the maximum pressure on the ship before it feels strained?
What are the machines used to generate the structure of the ship?

3 Things I learnt: The hulls of ships are subjected to many factors of pressure from the number of loads.
: There are ship classification societies who have established standard form for full loads.
: modern CAD computer programs are usually used today to generate much more detailed and powerful computer models of the structure.

Ideas I agree with: The many factors of pressure from the number of loads are essential to find out to stabilize the ship

Worksheet 3

Week 3 reflection --Jun Rong

In this week, we had discuss about how to convert the kinetic energy into hydro-electric energy.
We had mainly focus on the process of conversion so that it will lessen the burden of the whole project.

Some questions that are still going around in my head:

What materials are we gonna use to replace those that are used on an actual life size boat?

How are we going to substitute the turbine with a turbine that is smaller?

3 things I learnt:

I learnt that you need a water-turbine storing underneath the boat so that energy will be converted easily

We need to measure how much force needed for the boat to move which depends on the structure and materials use for the boat.

The power in available in a stream of water is;

where:

• P = power (J/s or watts)
• η = turbine efficiency
• ρ = density of water (kg/m³)
• g = acceleration of gravity (9.81 m/s²)
• h = head (m). For still water, this is the difference in height between the inlet and outlet surfaces. Moving water has an additional component added to account for the kinetic energy of the flow. The total head equals the pressure head plus velocity head.

• = flow rate (m³/s)