The Physics of Starship Battles: Lasers and Kinetic Energy UPGRADED SpreadingtheMuse Productions
By Bernard Finnigan. An explanation of the formula for kinetic energy and [...]
By Bernard Finnigan. An explanation of the formula for kinetic energy and photon energy, and how each is used in warfare, both now and in the future. This movie, 3 ...years ago, turned into my most downloaded physics educational film. It kind of took a life of its own and flew off into my most popular. It almost made itself, flying off my laptop in only 3 weeks and truth be told, I've been trying to capture that success ever since. This is the one from which everything else is measured. And now, uploaded in high quality, and the sound finally works 😉 These older ones have been bugging me for a while. Ever since I finally figured out how to solve the sound problem, I knew I'd have to go back and fix the old stuff if I ever wanted piece of mind (I'm a perfectionist). Once I get a few more uploaded, I do have an idea for the next movie floating around 😉 However, not all of these can be fixed. My first two Physics movies were filmed ENTIRELY on analog, meaning there's no way to upgrade the quality without totally starting over. It wouldnt be a matter of rerendering as with these ones, there's no quality to rerender. The math movies might have been saved if not for the soundtrack. The dubious echo effect is unfixable without totally erasing the whole thing. We make our choices and we have to live with them forever. It pushes us on to the NEXT project, with the drive to do it right. My last few movies have been entirely digital. 😉 And speaking of digital, thank god for Netflix streaming. Star Trek, Babylon 5, Battlestar Galactica, all there at seconds notice. Delicious 😉
GCSE Physics - Energy Stores, Transferring Energy & Work Done #1
In this video you'll learn: - The 'conservation of energy principle' - The [...]
In this video you'll learn: - The 'conservation of energy principle' - The different energy stores - How energy is transferred between stores - What we mean by 'work done'
General info: - Suitable for ...all GCSE and IGCSE courses
Exam board specific info: AQA - Everything is relevant to your course! IGCSE Edexcel - Everything is relevant to your course! Edexcel - Everything is relevant to your course! OCR 21st Century - Everything is relevant to your course! OCR Gateway - Everything is relevant to your course!
Led replacement bulbs
These are cool new led bulbs which are energy efficient. Advantages of LED [...]
These are cool new led bulbs which are energy efficient.
Advantages of LED Bulbs
The operational life of a LED lamp (up to 50,000 hours) is in contrast to the average life ...of an incandescent bulb, which is approximately 1000-2000 hours. For lights in very inaccessible places, using LEDs would eliminate the need for difficult bulb replacement for many years. It really is simply a case of fit-and-forget!
The cost of LED lights compared to traditional incandescent bulbs
The main advantage of LED lighting is clearly in the energy savings (and therefore money savings!) which are achieved. The way in which LEDs achieve this energy saving is by the amount of heat they create. Traditional incandescent bulbs lose up to 90% of their power on creating heat which is wasted. LEDs save on power consumption by generating considerably less wasteful heat.
The cost savings are considerably higher than just the energy saving if you consider the cost of 30-50 replacement incandescent bulbs. With LEDs, there would be no replacement bulbs required for many years and they often pay for themselves in energy savings in less than a year of use.
For commercial premises like retail outlets, hotels and offices, there is a significant maintenance cost in replacing light bulbs which can be virtually eliminated. This is an important point, especially where there are a large number of bulbs in place. Eliminating the constant need to replace bulbs by changing to LED options can be very attractive, and after the cost of replacing halogen bulbs is taken into account, LED bulbs really are the ultimate energy saving bulb.
As the LEDs which provide the light in the bulbs are so small, the high powered LED bulbs are direct replacements for halogen bulbs in terms of size. This gives LEDs a distinct advantage over energy saving CFL bulbs which are generally larger than their halogen counterparts, and can look unsightly in some elegant light fittings.
When it comes to display or accent lighting, the compact size of LED light bulbs, as well as the availability of coloured lighting provides for very versatile lighting which is appropriate everywhere from retail displays to Christmas lights in homes.
LED light bulbs represent the safest form of lighting and even when they go wrong, they are still not dangerous to be around, unlike incandescent bulbs which generate lots of heat when in use and have even been known to explode when things go wrong. LEDs are not strictly light bulbs, they are an electrical circuit (semiconductor). They do not contain filaments and therefore are not prone to the usual light bulb problems associated with incandescent bulbs.
LEDs will invariably last 30 to 50 times longer than standard incandescent bulbs, whilst using an average of 90% less power which makes them ideal for places where lights are switched on for lengthy periods of time. More durable with no fragile parts, the bulbs generate virtually no heat and are therefore safe in almost all areas around the home. The cool running temperature of LEDs could reduce air conditioning costs, and the fire risk associated with overheating incandescent bulbs is not an issue with LEDs.
As LEDs are very strong and durable, they are able to endure vibration so they are appropriate for use in many places where existing bulbs are subject to regular failure, eg around heavy machinery. They are also able to tolerate low temperatures and therefore allow more flexibility in their use.
LEDs do not produce any UV (ultraviolet) or IR (infra red) radiation, and can thus be used to light paintings or other precious artefacts without causing any fading. Unlike CFL or fluorescent lighting, LED lighting also does not flicker, and this reduces eye strain and other problems associated with flickering lighting solutions.
Taking Care of the Environment
Taking care of the environment has become a way of life in the 21st century, and we all have a duty to try and reduce our carbon footprints, be it at home or in our businesses. An easy way to make a start in improving the efficiency of our homes and businesses is through LED lighting. Environmental specialists list improving energy efficiency as an important factor to reduce our impact on the environment. LED lights use up to 90% less electricity than standard halogen bulbs and have an extremely long lifespan which equates to considerably reduced carbon emissions and less waste because fewer lamps need to be disposed of.
Have you seen the light yet?
Q7 1B Motion 4C Work Energy Power June 2018 iGCSE Physics
This is a quick video walkthrough of an Edexcel exam question. It is [...]
This is a quick video walkthrough of an Edexcel exam question. It is designed so you can look at questions which relate to questions from specific parts of the course.
It ...is taken from a real paper and I have used a real mark scheme which I have adapted for on-screen use. If you listen carefully it will give you a really good idea of what an examiner is looking for. This is a quick video walkthrough of an Edexcel exam question. It is designed so you can look at questions which relate to questions from specific parts of the course.
It is taken from a real paper and I have used a real mark scheme which I have adapted for on-screen use. If you listen carefully it will give you a really good idea of what an examiner is looking for.
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