Hey everyone,
If you need to ask us a revision question and we aren't in school please ask it here and we'll reply as soon as we can.
P1 - Core Physics
This is the first part of the core Physics syllabus. It comprises of sections on Energy, temperature and the transfer of heat energy; electricity (its generation and transmission) and environmental issues surrounding energy use including energy efficiency.
The second section of the core Physics course continues with sections on waves, the electromagnetic spectrum; the Solar system; Stars and the Universe.
The second section of the core Physics course continues with sections on waves, the electromagnetic spectrum; the Solar system; Stars and the Universe.
Website links to information on the transmission of electricity
- Copper’s role in electricity (go to Site map and then Copper and electricity)
- Centre for alternative Technology, Wales
- Wind energy (go to Wind farms of the UK then dynamic map of operational projects)
- Access to National Government
- Compares energy resources, has an online calculator
- Electricity generation FAQ
- Wind farm, Scarweather Sands, Swansea Bay (search for Scarweather)
Energy efficiency and heating the home
Greenhouse effect video
Energy sources for generating electricity video
Calculate your Carbon Footprint here
Waves and electromagnetic radiation
The next section of the P1 core Physics course is about waves and electromagnetic radiation.
The electromagnetic spectrum is a family of waves which are: radio waves; microwaves; infra-red; visible light; ultra violet; X-rays and gamma rays. Radio waves have the largest wavelength and the lowest frequency and gamma rays have the shortest wavelength and the highest frequency.
All these waves travel at the same speed as each other - this is known as the speed of light - although light is just one part of the spectrum.
The electromagnetic spectrum is a family of waves which are: radio waves; microwaves; infra-red; visible light; ultra violet; X-rays and gamma rays. Radio waves have the largest wavelength and the lowest frequency and gamma rays have the shortest wavelength and the highest frequency.
All these waves travel at the same speed as each other - this is known as the speed of light - although light is just one part of the spectrum.
Weblinks to sites for Waves and electromagnetic radiation
Fibre optics
Transmission of information by fibre optics has improved communication in many ways.
They have several benefits; they are not easy to tap into; the messages sent through optical fibres travel at the speed of light and fibre optics can carry more signals than wires.
Fibre optic cables are made up of many individual glass fibres.
They have several benefits; they are not easy to tap into; the messages sent through optical fibres travel at the speed of light and fibre optics can carry more signals than wires.
Fibre optic cables are made up of many individual glass fibres.
Weblinks to Stars and the Universe
Universe and Stars videos
The solar system and beyond - just sit back and listen!
The Universe - life and death of stars
OK everyone, here are the two videos we watched in class about the birth and death of stars.
I have included all five video links here although we only watched parts one and two in class - I thought you might like to see the entire series!
I have included all five video links here although we only watched parts one and two in class - I thought you might like to see the entire series!
Additional Physics - Year 10 Studies
You will begin your Year 10 studies by learning the content of the Additional Physics syllabus. During this year you will also do a piece of coursework.
P2 - Additional Physics
Additional Physics consists of several topics:
Radiation - radioactive emissions; the half life of radioactive materials and uses and dangers of radioactivity.
Electrical circuits and safety features in mains electrical circuits.
Forces and Motion:
Distance, speed and acceleration; the effect of forces and interactions between objects.
Radiation - radioactive emissions; the half life of radioactive materials and uses and dangers of radioactivity.
Electrical circuits and safety features in mains electrical circuits.
Forces and Motion:
Distance, speed and acceleration; the effect of forces and interactions between objects.
Radioactivity
Nuclear energy videos
Electricity weblinks
Lightning strikes video link
Forces weblinks
Some excellent presentations (just click on the link)
Video Bar (below)
Here are a couple of crash tests for you to see. Pay attention to the crumple zone at the front of the car. This area allows the time taken for the change in momentum to occur to be longer, so reducing the force acting on the car.
Newton's first law
General Links
Below are a list of links you may find useful in your studies.
General Physics Revision Links
P3 Further Physics - Year 11
You will study the Further Physics P3 syllabus during Year 11. You will also do another piece of coursework during this year.
Physics 3 (Further Physics)
The further Physics section of the course contains the following topics:
How do forces have a turning effect?
Even if the forces acting on a body are balanced in the sense that they do not cause the body to change speed, they can still make the body turn.
What keeps bodies moving in a circle?
A body remains stationary, or keeps moving at the same speed in a straight line, unless an unbalanced force acts upon it. If a body moves in a circular path there must be an unbalanced force acting upon it all the time.
What provides the centripetal force for planets and satellites?
The planets, like the Earth, orbit the Sun. Artificial satellites, which are used for communications and monitoring, orbit the Earth. Gravitational force provides the centripetal force that allows all of these bodies to orbit.
What do mirrors and lenses do to light?
Mirrors and lenses can be used to form images in optical devices such as cameras and magnifying glasses. The most commonly used mirrors and lenses have surfaces with a uniform curvature and these are the only ones that need to be considered. All objects and images will be located vertically on the principal axis.
What is sound?
Sounds are mechanical vibrations that can be detected by the human ear. This means they are in the frequency range 20–20 000 Hz.
What is ultrasound and how can it be used?
Just as there is electromagnetic radiation with frequencies we cannot see, there are ‘sound’ waves with frequencies we cannot hear. These ultrasound waves have several important uses.
How can electricity be used to make things move?
Electric currents produce magnetic fields. Forces produced in magnetic fields can be used to make things move. This is called ‘the motor effect’ and is how devices, such as the electric motor and circuit breakers, create movement.
How do generators work?
If an electrical conductor ‘cuts’ through magnetic field lines, an electrical potential difference is induced across the ends of the conductor. This is called the ‘generator effect’ and is used in generators to produce electricity.
How do transformers work?
Transformers are used to step-up (increase) or step-down (decrease) a.c. potential differences.
What is the life history of stars?
Astronomers believe that gravitational forces are responsible for the formation of galaxies of stars, and for stars like the Sun having a long stable period.
How do forces have a turning effect?
Even if the forces acting on a body are balanced in the sense that they do not cause the body to change speed, they can still make the body turn.
What keeps bodies moving in a circle?
A body remains stationary, or keeps moving at the same speed in a straight line, unless an unbalanced force acts upon it. If a body moves in a circular path there must be an unbalanced force acting upon it all the time.
What provides the centripetal force for planets and satellites?
The planets, like the Earth, orbit the Sun. Artificial satellites, which are used for communications and monitoring, orbit the Earth. Gravitational force provides the centripetal force that allows all of these bodies to orbit.
What do mirrors and lenses do to light?
Mirrors and lenses can be used to form images in optical devices such as cameras and magnifying glasses. The most commonly used mirrors and lenses have surfaces with a uniform curvature and these are the only ones that need to be considered. All objects and images will be located vertically on the principal axis.
What is sound?
Sounds are mechanical vibrations that can be detected by the human ear. This means they are in the frequency range 20–20 000 Hz.
What is ultrasound and how can it be used?
Just as there is electromagnetic radiation with frequencies we cannot see, there are ‘sound’ waves with frequencies we cannot hear. These ultrasound waves have several important uses.
How can electricity be used to make things move?
Electric currents produce magnetic fields. Forces produced in magnetic fields can be used to make things move. This is called ‘the motor effect’ and is how devices, such as the electric motor and circuit breakers, create movement.
How do generators work?
If an electrical conductor ‘cuts’ through magnetic field lines, an electrical potential difference is induced across the ends of the conductor. This is called the ‘generator effect’ and is used in generators to produce electricity.
How do transformers work?
Transformers are used to step-up (increase) or step-down (decrease) a.c. potential differences.
What is the life history of stars?
Astronomers believe that gravitational forces are responsible for the formation of galaxies of stars, and for stars like the Sun having a long stable period.
Saturday, 3 November 2007
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25 comments:
heyy Mrs. G
i was just wondering if you could run over the basics of what you want in this presentation as i have confused myself and everyone else seems a bit unsure on it too.
Thanxs
Hollie :)
xxxx
Hey Hollie,
Your best bet is to start off by researching the installation of a wind turbine at your home, how much it will cost to install and what size is the best for you. You could then find out how much your electricity bill is each year (approximately is fine) and so calculate how long your 'pay back time' for installing the turbine will be.
Next you do the same sort of thing for solar panels. They will heat up your water for your central heating etc so will also save you money on your electricity (or gas) bills. Again, find out how much it costs to install and your costs of electricity or gas and so then you can calculate your savings and pay back times.
I hope this helps Hollie, have a lovely holiday,
Best wishes
Mrs G
Hey Mrs. G
I was wondering, how do you calculate the 'pay back time' once you have found out what your electricity bills are each year?
Thanks
Hope you had a great Christmas!
Mai xxx
Hi Mai,
Yes, I had a lovely Christmas thank you, I hope you did too!
The pay back time is calculated by taking the cost of installing the equipment - say £3000 and dividing it by the amount you pay for electricity each year - say £300 so for these figures the pay back time would be 10 years.
I hope this helps you, so nice to hear from you all!
See you soon,
Mrs G :-)
Heyy Mrs Goodwin!! How are the holiday going? Nice Christmas? Oh and Happy New Year!
I was just wondering if we should write about how much energy we should be saving and how to calculate that?
Thanks
Sophie xoxo
Hi Sophie,
Thank you, same to you!
You can mention how much energy you'd be saving each year and the fact that it will reduce your carbon footprint. There is a carbon footprint website you can go to in order to find out how your footprint is looking and this will then let you recalculate it after your energy saving efforts.
I'll try to remember the web address for the site and will add it to the blog if I can remember it!
See you soon,
and Happy New Year!
Mrs G
Hi again Sophie,
I found it - see the link above, this site will allow you to calculate your carbon footprint (or your impact on the planet).
Hope it helps - it sounds as if you are being very thorough, well done!
Best wishes
Mrs G
Hey Miss
good christmas?
i've got a problem, i don't use coal in my house and i can't find out how much the average cost is for coal in a home per year.
Do you know how much coal is generally used, or do you know a website i could get the info?
thanks, happy new year :)
Annie
xoxo
Hey Mrs Goodwin!
Its me again!
I have been looking everywhere, to try and find how much it costs to install solar panels, but every website I go on tells me something different. I have got 24 years payback time. Does that sound right to you? Hope you can help.
Thank you very much!
Mai
xoxox
Hi Annie,
Yes, I had a lovely Christmas thank you, I hope you did too.
Now, to your question, its not the coal you use in your house that we are interested in, its the coal that the power station uses to generate the electricity you use in your house that counts! So, you find out how much your electricity bill is each year and this figure is then used to calculate the 'payback time' for the cost of installing a wind turbine. (See previous posts here to other students) these will tell you what to do with these figures.
I hope this all helps you. See you on Tuesday!
Best wishes
Mrs G
Hi again Mai,
It sounds like you are working hard, well done! Each website will give you different results as they are all trying to sell you solar panels and their products cost different amounts to other suppliers, this is normal. All you have to do is choose one to use and then do your calculations using their fugures.
Twenty four years sounds about right for pay back time believe it or not, they are really expensive to buy - that's one of the biggest drawbacks so it seems to me that you are doing fine, I can't wait to see your work.
See you on Tuesday,
best wishes,
Mrs G
Hi miss
do you have to find out how much it costs the companies to produce the energy as well as how much it costs you to run your home?
and do you have to mention decommisioning costs?
thanks
Hi Tom,
No, just the costs they charge you! So no decomissioning costs either.
See you soon,
Mrs G
Hi Miss, me again!
when i click on the link wth th online calculator i can't find it, it won't come up o i was wondering if there was any way i could work it out in a written or mental way instead?
Thanks
Sophie
xoxo
Hi Miss
How do we work out how much the oil and coal would cost?
And how many slides is the minimum?
Thanks
Hi Sophie and Joe,
You are back in school now so its easier to come and see me when you get chance but briefly, Sophie, don't worry about this aspect of your project too much its not needed and Joe, you don't need the costs of coal as its the power stations that need it not you. The gas costs (if you use it at home) can be obtained from your parents.
The number of slides is up to you, as long as your information is complete.
See you in school,
Mrs G
hey mrs G
you know microwaves travel along opical fibres but are then converted in to infra red pulses, how is it coverted or what is it converted by.
thanks
james
Hi James,
Microwaves are used to communicate with satellites not used in optical fibres! Two totally different things. Optical fibres use infra-red and visible light for transmission of signals. There is no conversion of microwave radiation into infra-red, you've got slightly mixed up here, don't worry, just see them as two different things James!
Best wishes,
Mrs G
Hi Miss
I think I've lost the sheet saying what we need to do :/ I was justwondering what the second task was?
Cheers
Hey Joe,
You need to do a second information pamphlet, this time telling me about the uses of microwave radiation to communicate with satellites - these are used for mobile phone communication.
Then you need to tell me about the uses of infra-red radiation in fibre optic cables that are used for cross continental communication.
Compare these two types of communication methods and show a diagram of a satellite in orbit above the earth and total internal reflection occuring in a fibre optic cable.
See you on Monday,
All the best,
Mrs G
hi miss, its Jake
I was looking on the WJEC website and I cant seem to find any answer sheets so that i can mark my work if its a snowy day, so I was wondering if you could tell me how I could the answer sheets?
Thankyou
*find
Hi Jake,
Soory the answers are in a password protected area but school is open tomorrow and I have your class so see you then!!
Mrs G
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