Tag Archives: gravity

## What and how: fruits/vegetables and diverting an asteroid

What is the difference between a fruit and a vegetable? You call it a fruit when the part that you eat stemmed from the flower of the plant, then grew around some seeds. This way cucumber, peas, apples, pears and tomatoes are fruits. But what about vegetables? If you eat the root, the leaves or […]

## The many formulas of gravity: each one tells something about it

Gravity is the force that keeps you glued to Earth. Except it is not a force as it is a space-time distortion generated by the presence of mass. But we will still be able to use formulas for it and still call it a force. There are three formulas for force: – F = m […]

## Gravity is NOT a force

But we have formulas that are checked and double-checked? How could it not be a force? Gravity is not a force, it is a space-time distortion caused by the presence of mass. In other words, if you put two masses in relative vicinity there won’t be a force that attracts each one to the other […]

## Gravity is weak in 3D, but it may be stronger in 4D or more

Fermilab’s Dr. Don Lincoln shows us that gravity is way weaker than magnetism and that gravity itself may manifest fully in a \$D or more dimensional space. Since gravity is actually space-time bent in the presence of matter meaning that it isn’t actually a force per-se, much like centrifugal force is not a real force, […]

## Bill Nye explains how we can protect our planet from asteroids

Bill Nye, the inspiring figure of decades off science shows in USA, explain how we can protect our selves from an asteroid attack and all of the methods involve changing the asteroid’s speed by a ten millionth metters per second and then you’ll make it go past Earth. How can you change the speed of […]

## Space straw or how Vsauce explains that we owe gravity big time

Vsauce explains, once again, why we should thank gravity. If you would us a straw that can reach the space and put one end of it in the ocean you wouldn’t lose the water form the oceans. That is simply because gravity would hold that water down. In any case, that water would still go […]

## Rube Goldberg anti-gravity machine [illusion]

Watch it once, don’t believe it. Watch it twice, still don’t get it. This Rube Goldberg defies gravity. Sir Isaac Newton is turning in his grave right now. The illusion is created by using magnets and the first part of the device is installed on the roof. Once the camera turns you will see that […]

## What if Earth were hollow and what does it take to destroy the Sun?

Minute Physics explores a world where we can fall through Earth to the other side and also asks what if Earth were hollow? If we had a tunnel from one Pole to the other and would jump in it we would accelerate until we would reach maximum speed at the core of Earth and then […]