Why Isn't "Zero G" the Same as "Zero Gravity"?

Category: Physics

This Quick Question explains the difference between gravity and g-force, and how you can experience zero-g in space even when it’s not zero gravity!

You might also like

Einstein's Nightmare

How Albert Einstein thought he'd found the fatal flaw in quantum theory because it implies that sub-atomic particles can communicate faster than light.

1/2The Secrets of Quantum PhysicsPhysics

Big Trouble

Hannah starts her journey by asking whether everything could be bigger, finding out what life would be like on a bigger planet. As the Earth grows to outlandish proportions, gravity is the biggest challenge, and lying down becomes the new standing up. Flying in a Typhoon fighter jet with RAF flight lieutenant Mark Long, the programme discovers how higher G-force affects the human body, and how people could adapt to a high G-force world. But by the time Earth gets to the size of Jupiter, it's all over, as the moon would impact the planet and end life as we know it. Next, Hannah tries to make living things bigger. The programme examines the gigantopithecus, the biggest ape to ever exist, creates a dog the size of a dinosaur and meets Sultan Kosen, the world's tallest man. Humans are then super-sized with the help of Professor Dean Falk to see what a human body would look like if we were 15m tall. The sun gets expanded, and Professor Volker Bromm looks back in time to find the largest stars that ever existed, before the sun explodes in perhaps the biggest explosion since the big bang.

1/2Size Matters with Hannah Fry • 2018 • Physics

Are Space and Time An Illusion?

Space, time and the nature of reality.


What Happened to Antimatter?

Particles come in pairs, which is why there should be an equal amount of matter and antimatter in the universe. Yet, scientists have not been able to detect any in the visible universe. Where is this missing antimatter?


Quantum Entanglement - Atomic Physics and Reality

A historical account from 1985 of the long standing debate between Niels Bohr and Albert Einstein regarding the validity of the quantum mechanical description of atomic phenomena and observation of quantum states with respect to the uncertainty principle and quantum entanglement. Starring some famous physicists, John Archibald Wheeler, John Stewart Bell, Alain Aspect, David Bohm and others. Interesting material about the famous concept of "Spooky action at a distance" as quoted by Albert Einstein, an example of his displeasure at the nature of non-locality as a consequence of quantum entanglement which is nevertheless how particles in the universe work.

1985 • Physics

The Matter of Antimatter Answering the Cosmic Riddle of Existence

You exist. You shouldn’t. Stars and galaxies and planets exist. They shouldn’t. The nascent universe contained equal parts matter and antimatter that should have instantly obliterated each other, turning the Big Bang into the Big Fizzle. And yet, here we are: flesh, blood, stars, moons, sky. Why? Come join us as we dive deep down the rabbit hole of solving the mystery of the missing antimatter.

World Science Festival • 2018 • Physics