Science
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Why do people think physics is difficult?? Is it because they think it's boring or is it because they find it complicated? Who is Isaac Newton, why did he find Gravity, how gravity is connected to the magnetic field, which is connected to electricity?? Yes, there are lots of questions. But physics is not just a field of science, everything around you is connected to physics. Velocity, displacement, speed, force, light, reflection, refraction, entropy, torque, all these things you can find in your daily life. There are different fields of physics such as fluid dynamics, thermodynamics, electrostatics. And to make these fields easy, scientists such as Georg Ohm, Han Christian Oersted, Daniel Bernoulli made some laws such as Ohm's law, Bernoulli equation, right- left-hand rule. So here is a video that explains most of physics in 10 minutes.
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Five areas of physics worth remembering: Classical mechanics, energy and thermodynamics, electromagnetism, Relativity, and Quantum Mechanics. Classical mechanics - two main concepts worth knowing. The first is Newton’s second law: F= ma: Force equals mass times acceleration. If you apply a force to a fixed mass, it tells you how much acceleration you will get. And knowing acceleration which is the change in velocity, you can make predictions.
The second equation is the law of universal gravitation. it allows us to determine the motion of heavenly bodies. It says that the gravitational attraction between two bodies is the product of their masses divided by the distance between them squared, times a constant, called Newton’s gravitational constant.
Energy is not a vector like force or momentum, but it is just a number. Work is closely related to energy. It is force times distance traveled. Energy for most objects consists of kinetic energy plus potential energy. KE is the energy of motion, It is KE = ½ M V^2 – the more mass you have and/or the more velocity you have, the more energy you have.
Gravitational potential energy is expressed as PE = m g h – mass times the gravitational acceleration times the height. The total energy of an object is both Kinetic energy plus potential energy. Potential energy can take many forms. Gasoline or petrol has chemical potential energy. Important: Energy is always conserved. It is not created or destroyed. It only changes form.
Thermodynamics is the study of work, heat, and energy on a system. We showed energy is how much work you could do. But another form of energy is thermal energy. If a car is moving and you apply the brakes, the kinetic energy of the car gets converted to thermal energy, created by friction of the car’s brakes. Temperature is the average kinetic energy of atoms in a system. Thermal energy is the total kinetic energy of atoms in a system.
Entropy is a measure of disorder, or more accurately, the information required to describe the micro states of a system. The 2nd law of thermodynamics states that entropy of an isolated system can never decrease. Energy at lower entropy can do more work than energy at high entropy. The one way flow of Entropy seems to be the only reason we have a forward flow of time.
Electromagnetism is the study of the interaction between electrically charged particles. The essentials are in Maxwell’s equations. If you have a static object with a charge, it will affect only other charges. If you have a static magnet, it will affect only other magnets. It will not affect charges. But if you have a moving charge, it will affect a magnet. And if you have a moving magnet, it will affect a charge. The constants mu naught and epsilon naught are the permeability and permittivity of free space. These two constants determine the speed of light because they measure the resistance of space to changing electric and magnetic fields.
Special Relativity: Einstein presumed that the speed is the same in any frame of reference. This was one of the postulates.
The second postulate was principle of relativity - the laws of physics are the same for all observes who are moving at the same velocity relative to each other. Einstein showed that the only way these can be true is if time was not fixed, but was relative.
General relativity: Later Einstein showed using the same assumptions, there would be no way to tell if you were in an accelerating reference frame or standing stationary on earth. A flashlight beam will bend in gravity. But since light always takes the shortest path between any two points, this means that space-time itself is bending.
Quantum mechanics: Three principles are important. First by Max Planck, says that energy is not continuous, but is quantized. The amount of energy equals the frequency of the radiation times Planck's constant. Using this, Einstein later showed that a photon is both a wave and a particle.
The second is the Heisenberg's uncertainty principle: you cannot know both a particle’s exact position and it’s exact momentum at the same time. For a particle with mass, this means if you know exactly where a particle is, you don’t know how fast going. If you know exactly how fast it’s going, you don’t know where it is.
#allphysics
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Schrodinger's equation: prior to measurement, quantum systems are in superposed states. This means that their properties can only be expressed as a wave function. A wave function simplified, is a set of probabilities. So in a hydrogen atom, you can’t know where to find the electron in advance. All you can know is the probability of where you might find it, if you measured it. Prior to measurement, all quantum systems are waves of probabilities. This is not a limitation of our measuring devices. It is a limitation of reality.
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When you pop a water balloon underwater does the water stay in one place or spread out? If we dye the water we can see how a water balloon behaves when it is popped under water and how that behavior changes when the water is hot or cold. The experiment see how density of liquids changes with temperature and how diffusion rates change with temperature.
Here are some more fun experiments!
Best Conservation of Momentum Mind Bender! (Part 1)
https://youtube.com/shorts/GgRXWJhDv8M
Best Conservation of Momentum Mind Bender! (Part 2)
https://youtube.com/shorts/9Fld4bnfpWY
Check out the WHOLE Whoosh Bottle Series!
1. Fun FULL experiment! (Click Full Screen!)
https://youtu.be/TjEc-lNJgng
2. Probably don't try this (I get a free whoosh bottle shower)
https://youtube.com/shorts/owCWNtWPg6Y
3. Try not to Flinch (see how stoic you are!)
https://youtube.com/shorts/f1GJWdI-noI
4. Try getting rid of smoke with this technique
https://youtube.com/shorts/fudymWKAO04
5. Whoosh Bottle foil ROCKET...High or low pressure?
https://youtube.com/shorts/2xyzZlOEFss
6. Whoosh BIG Balloon
https://youtube.com/shorts/YLHAPr7QpQc
7. Setting up the Whoosh Bottle
https://youtube.com/shorts/S7-iIacN8fo
8. Slow Motion Explanation
https://youtube.com/shorts/559OhYt7dKs
9. 5 Gallon Bottle Crush
https://youtube.com/shorts/xzW10-wXEk4
Like Challenges?
1. Best Conservation of Momentum Mind Bender! (Part 1)
https://youtube.com/shorts/GgRXWJhDv8M
2. Best Conservation of Momentum Mind Bender! (Part 2)
https://youtube.com/shorts/9Fld4bnfpWY
3. Best Conservation of Mass Experiment EVER!(maybe)
https://youtube.com/shorts/u8pg7OEyWjU
4. Which Candle goes out first?
https://youtu.be/KkKMnq1PqLs
5. How many candles can you relight with smoke?
https://youtube.com/shorts/HsSmVGBhPXA
6. Static Electricity and Sand
https://youtube.com/shorts/1b4X75gzuZk
#Flemdogscience #balloons #scienceexperiment #bestshorts #trendingshorts
This video covers:
- What waves are
- How to label a wave. E.g. amplitude, wavelength, crest, trough and time period
- How to calculate wave speed
- The difference between transverse and longitudinal waves
General info:
- Suitable for all GCSE and IGCSE courses
- Suitable for higher and foundation tiers
- Suitable for triple and combined science
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!
Quantum physics, also known as quantum mechanics, is a fundamental theory that describes the behavior of matter and energy at the smallest scales, such as atoms, molecules, and subatomic particles. It provides a framework for understanding the strange and counterintuitive phenomena that occur in the quantum realm. Here, we explore three of the most fascinating phenomena in quantum physics that challenge our classical understanding of the universe.
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!
NOTE FROM TED: We've flagged this talk, which was filmed at a TEDx event, because it appears to fall outside TEDx's curatorial guidelines. This talk only represents the speaker’s personal understanding of quantum physics and energy. The concepts discussed in this talk are not based on peer-reviewed scientific evidence or research. TEDx events are independently organized by volunteers. The guidelines we give TEDx organizers are described in more detail here: http://storage.ted.com/tedx/ma....nuals/tedx_content_g
Many people have dreams and desires that they let go dormant simply because they don't know how to make it their reality. Understanding the tools and laws that are currently available to them is the one key they are missing. Suzanne has shifted her entire life to create the life she has always dreamed of, by simply utilizing quantum physics and the laws of energetics. Suzanne Adams is a best-selling author, thought-leader, and business coach whose teachings on quantum physics, laws of energetics, and women's empowerment have impacted thousands of people from all over the world. She has personally trained with powerful leaders like Lisa Nichols and Gabby Bernstein and has taught over 5,000 successful professionals how to step into their power and achieve fulfillment, including how to make dreams a true reality.
Suzanne has been featured on Fox, NBC, and The Huffington Post for her work helping entrepreneurs reach their highest levels of potential. Now she is passionate about bringing her own personal story, knowledge of quantum physics and the power of human transformation to the TEDx stage. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx
In this lighthearted talk Dominic Walliman gives us four guiding principles for easy science communication and unravels the myth that quantum physics is difficult to understand, it’s all in how it’s explained.
Dominic Walliman is a physicist, and award-winning science writer. He received his PhD in quantum device physics from the University of Birmingham and currently works at D-Wave Systems Inc., a quantum computing company in Vancouver. Dominic grew up reading science books and remembers vividly the excitement of discovering the mind-boggling explanations that science gives us about the Universe. If he can pass on this wonder and enjoyment to the next generation, he will consider it a job well done.
This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at http://ted.com/tedx
