Sunday, February 21, 2010
Survey on the Awareness of Boats and Hydroelectricity
Week 6 Reflection- Isaac Phua
What i know about the surveys:
I know that surveys are made to find out views from the public, what they know and think about a certain subject. Surveys are used to make improvements after looking at what the public thinks about a certain subject.
What i think about the surveys:
I think that surveys are a useful way of collecting information from the public and to find out what the public thinks about a topic
What i found out in the survey:
We have not published the survey so we have not gather any information yet.
What i can do after the survey:
After doing the survey we can use the information gathered and put it into a graph or chart to compare the information
Week 6 reflection- Jun Rong
week 6 reflection--yonghwa
Week 6 Reflection--Jun Jie
Friday, February 19, 2010
Week 5 Reflection-Isaac
Thursday, February 18, 2010
Week 5 reflection-- Jun Rong
Wednesday, February 17, 2010
Sunday, February 14, 2010
week 5 reflection-- yonghwa
Week 5 Reflection--Jun Jie
Sunday, February 7, 2010
Week 4 Reflection-Isaac
(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.
The areas our group will be researching are:
(1) Types of turbines and the material used
(2) Concept of Hydroelectricity
(3) Concept of Kinetic Energy
(4) Structure and material of the boat
We have split the research questions among the four of us and we will be posting our findings on the blog. When this is accomplished, all four of us will study the research findings.
The product that we are thinking of creating is as follows:
A hydro electrical powerboat.
week 4 reflection-- Jun Rong
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.
Saturday, February 6, 2010
week 4 reflection--yonghwa
(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
Tuesday, February 2, 2010
week 3 reflection- yonghwa
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
Monday, February 1, 2010
Week 3 reflection --Jun Rong
We had mainly focus on the process of conversion so that it will lessen the burden of the whole project.
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)