A question?

we all know that usually we use black and opaque paper for experiment right? but why can't we use other opaque paper like dark purple or yellow???

others form of energy

If energy used in Singapore (oil and natural gas) were depleted we can use renewable energy such as:
· Solar energy(solar panels)
· Wind energy (windmills, wind turbines)
· Tidal energy/wave energy(from a dam)
· Biofuels(plant) used in cars as petrol

Renewable energy now produce 13% of the world electrical:
Hydropower 2-3% and others including wind, solar, and marine energy together - less than 1%

Singapore average daily max temp: 30.9ºC / average daily temp: 23.9ºC
1) Solar panels which can produce 115watt of electricity cost average $640.
2) Shortage of land to build a solar energy power station.
Wind energy is a clean fuel source. Wind is actually a form of solar energy caused by the heating of the atmosphere by the sun, the rotation of the earth, and the earth's surface irregularities. It is intermittent (not constant)Biofuels can be defined as solid, liquid, or gas fuel derived from biomass.
The first batch of biofuels used new plants natural sugar to make biofuels. This may lead to shortage of food as we do not have any extra land for growing our crops.
Examples of plant ethanol: sugar beets, sugar cane, corn, wheat and barley. Most trees and grasses are made of cellulose, which can also be converted into sugar, although not as easily as starch.

harness the energy produced

When we walk, heat energy will be produced. The solar cells underneath the shoes will take in the heat energy and stored the energy into the solar cells. The solar cells which are connected to the user’s bag by a series of wires will be changed into electrical energy to charge any electrical devises in the bag. So we will not have to worry about batteries being flat because we have a portable ‘electrical charger’!!!!!!

low heng yi(26) 6 grace

Alternative source of kinetic energy

We can use the movement of cars on the road to make a machine that can absorb carbon dioxide which can help SAVE THE EARTH.

Alternative Source of Electrical Energy

Alternate sources of energy:

The first option we could use is hydro-electric energy which seems to be expensive but much more convenient than that of a windmill as the wind is unpredictable resulting to a unsteady supply. Hydro-electric energy are much more constant as the water will be rushing at it most of the time - unless there is a drought of course. 
The other source would be the wind mill.Yes, it has an unsteady supply but it is much CHEAPER than Solar energy. And it's enviromentally friendly too! (well, it should be...)
Moving on, We have the Solar panels. Solar energy is good and enviromentally freindly but what's that? Yes, it is VERY EXTREMELY EXPENSIVE. And, we need a great amount of solar energy to have an adequate amount of electricity. Another fault, at night, we won't get any energy, unless there's a device which saves the electricity of course!!! 
So what should we do is there's not enough electricity? Two answers:
1) Use less electricity!
2) Combine the electricity from the alternate sources!

Fauzia's note: Hello! I managed to sneak on to the computer to do this!Anyway, If I did something on my answer that shouldn't be there, please tell me! Thank you!

making eletrical emergy with kinetic energy

In power stations, they make use of kinetic energy of water to convert it into eletrical energy.I'm not sure but maybe, we could put water in a container and we could hang it around our wrist and when we are moving, the water will also move.maybe we could converte it into eletrical energy.but of course, we have to invent a container that is small but can contain a lot of water.^>^i'm not sure about this . i don't even know how to convert kinetic energy of water to eletricity.But i just thought it could be possible.
~thank you for reading my writing~^^!~

Altenative use of kinetic energy

I think we could use kinetic energy to.....
1) Power the street lights.
2)In soccer courts, we can use the kinetic energy which the players use to kick the ball to power the score board and the lights in the stadium.
3)When people use bicycles, we can use the kinetic energy that people use to paddle to power the lights of the bicycles.
4) In schools, the kinetic energy that the pupils use to play can be converted to power the speakers, lights, fans,etc.

i think they can create something that can absorb carbon dioxide then convert into electrical energy and put it at the place that need electric, so there will be electric all the time!!!

Energy - Alternative use of kinetic energy

We can use those kinetic energy we use in walking, running and playing using some energy conversation heat, into electrical energy such as, lights , fans, televisions, computers, and even mp3s or mp4s. This can reduce the usage on using too many fossil fuels which are now scarce all around the world.

i think they should put something on the pathway so when people walk on it ,the lights will automatically be turned on .


Natalie Ng Hui Xin