So, the next time you trip and fall, or feel the weight of your body pulling you down, remember: gravity is a gift. It’s the invisible thread that keeps you grounded, connected to this beautiful planet we call home.
Your body would also suffer. Without the constant pull of gravity, your bones would become weak and fragile, your muscles would shrink and lose strength, and even your heart would have trouble pumping blood properly. Life would become a daily struggle.
Gravity is not just something that keeps you on the ground. It has shaped our entire planet—carving mighty rivers, forming giant mountains, and creating the landscapes that have supported life for billions of years. Without it, none of this would exist.
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Physics slimes, ragdoll playground and vehicle & magnet simulators. Let’s play Physics! Fun!
Check out these awesome physics particles and liquid simulations in Physics! Fun! 🧪💥
How would you use them in your sandbox?
Slimes merge and mash together. Physics! Fun is your all-in-one relaxing simulation game. Play Physics! Fun now!
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Unlocking the secrets of the universe, one string at a time. Join us on a journey beyond the visible into the realm of possibility!
Unraveling the Mysteries of String Theory: A Journey Beyond Particle Physics
Flat Earth Gravity 101 part 1
Ever wondered what it would take for a flat Earth to have the same gravitational pull as our spherical home? Let’s dive into a quirky thought experiment that merges fantasy with physics.
Gravity 101: On our globe, gravity pulls us towards the center, making us stick to the surface no matter where we stand. But what if the Earth was not a sphere, but a flat, infinite plane? How thick would this plane need to be to mimic the gravity we know and love?
Using the average density of Earth (5510 kg/m3) and some nifty physics equations, we find a surprising answer. For a flat Earth to have the same gravitational pull (9.81 m/s2), it would need a thickness of about 4,246 kilometers. That’s roughly a third of the actual Earth’s radius!
Why It Matters: This mental gymnastics isn’t just for fun. It challenges us to understand gravity in new ways and appreciate the peculiarities of our three-dimensional, spherical world.
Thought-Provoking Follow-Ups:
- How would weather behave on a flat Earth?
- What would happen to day/night cycles and seasons?
- How would our perception of space and distance change on an infinite plane?
This exploration isn’t just about questioning the shape of the Earth—it’s about expanding our understanding of physics in the unique world we inhabit. Let’s keep questioning, exploring, and learning!
Devin Playing with Water and Pepper l Devins World
Devin, an avid young scientist, explores the fascinating world of physics by conducting a captivating experiment with water and pepper. Watch as he demonstrates the magic of surface tension and cohesion in “Devin’s World.”
This string shooter uses two wheels on motors to push a string forward while a tube guides the string back through the wheels, creating a constant loop that appears to defy gravity & demonstrates wave phenomena.
The string shooter is a fascinating device that can be used to demonstrate various physics concepts, such as air drag, wave phenomena, and hydraulic jump. It consists of a pair of counter-rotating wheels that propel a closed loop of string at a constant speed. The string loop forms a stable shape that remains suspended in the air, seemingly defying gravity. How does this device work and what are the physics behind it?
One way to understand the string shooter is to consider the forces acting on each segment of the string loop. The string is subject to three main forces: tension, gravity, and air drag. Tension is the force exerted by the wheels on the string, which keeps it moving forward. Gravity is the downward force due to the mass of the string, which tends to make it fall. Air drag is the resistive force due to the interaction of the string with the surrounding air, which opposes its motion.
The balance of these forces determines the shape and stability of the string loop. At low speeds, gravity dominates over tension and air drag, and the string hangs down like a pendulum. As the speed increases, tension becomes more important and the string rises up. At some critical speed, tension and gravity cancel out, and the string becomes horizontal. This is similar to what happens when a rope is spun around by hand.
However, at higher speeds, something interesting happens. The string loop does not remain horizontal, but bends upward into a self-supporting loop. This is because air drag becomes significant and creates a lift force on the string. The lift force is perpendicular to both the direction of motion and the direction of gravity, and acts as a centripetal force that keeps the string in a circular path.
The shape of the string loop can be described mathematically by using some simplifying assumptions. One assumption is that the string has a negligible radius and mass compared to its length and speed. Another assumption is that the air drag is proportional to the square of the speed and depends on the angle between the string and the airflow. Under these assumptions, one can derive a differential equation that relates the curvature of the string to its speed and angle.
The solution of this equation reveals some interesting features of the string loop. One feature is that there is a critical point on the loop where the speed of the string matches the speed of sound in air. This point separates two regions: a supercritical region where the speed of the string is greater than the speed of sound, and a subcritical region where it is lower. In the supercritical region, any disturbance on the string cannot propagate upstream, while in the subcritical region, it can.
Another feature is that there are two types of solutions for the shape of the loop: regular solutions and singular solutions. Regular solutions are smooth and continuous, while singular solutions have a sharp turn at the critical point. The regular solutions are analogous to hydraulic jumps in fluid dynamics, where a fast-moving stream transitions to a slow-moving one through a shock wave. The singular solutions are more realistic and correspond to what is observed experimentally.
The string shooter is an example of how simple devices can reveal complex physics phenomena. It shows how air drag can create lift and stabilize a loop of light string in mid-air. It also shows how supersonic and subsonic regimes can coexist on a single object, creating a critical point where waves cannot propagate. The string shooter is not only fun to watch, but also educational to analyze. I hope you enjoyed reading & learning about the string shooter. 😊🙏
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Physics is the natural science that studies matter, its fundamental elements, its mobility and behaviour in space and time, as well as the associated phenomena of energy and force. Physics is one of the most fundamental scientific fields, with the primary purpose of understanding how the universe functions.
Despite competition for conventional research employment, prospects for physicists in applied research, development, and related technological domains should be favourable.
Overall employment of physicists and astronomers is expected to increase by 8% between 2020 and 2030, roughly in line with the national average.
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QUANTUM MECHANICS: A TEXTBOOK FOR UNDERGRADUATES, SECOND EDITION by Jain
• Incorporates detailed historical introduction to quantum mechanics
• Comprises sections on Time Variation of the Expectation Value of An Observable and Ehrenfest’s Theorem in the respective chapter
• Includes several new numerical problems as well as solutions/hints to the existing exercise problems
For more information log on to http://social.phindia.com/nIGLfQny
Posted @withregram • @scienceoftheuniverse Last one🥴
The eBook is by @physicsgene and It’s really fantastic and I recommend it to anyone since it’s really cheap with a lot of value! It will introduce you to what physics really is from quantum mechanics to general relativity!
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