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### Table of Contents:

- How did Einstein describe gravity?
- How do you unify gravity?
- Why can't quantum mechanics explain gravity?
- Is anti gravity possible?
- Can we explain gravity?
- Is gravity an illusion?
- Is gravity a wave or particle?
- Can gravitons be dark matter?
- Does gravity have a frequency?
- Does gravity exist at the quantum level?
- Who invented quantum gravity?
- Why is gravity not a force?
- Why gravity is so weak?
- What is the strongest and weakest force?
- Which is the strongest force in the universe?
- Which country has the lowest gravity?
- Is Earth losing mass?
- Is Earth's gravity increasing?
- At what height Earth gravity is zero?
- How 9.81 is calculated?
- Can you create zero gravity on Earth?
- Why value of g is greater at pole?
- Where is value of G minimum at poles or at Equator?
- What is the speed of gravity on Earth?
- What is the value of G on moon?

## How did Einstein describe gravity?

**Einstein** argued that **gravity** isn't a force at all. He described it as a curvature of time and space caused by mass and energy. ... Their math, laid down in 10 equations, explained how **gravity** could move around objects via a warped reality, accelerating without ever feeling any mysterious Newtonian forces.

## How do you unify gravity?

To **unify gravity**, you would have to be able to convert bosons to fermions and vice versa. You don't have the nice matchup of leptons and quarks that you had in the previous steps, and this seems to call for a new class of particles.

## Why can't quantum mechanics explain gravity?

**Quantum mechanics** suggests everything is made of quanta, or packets of energy, that can behave like both a particle and a wave—for instance, quanta of light are called photons. Detecting gravitons, the hypothetical quanta of **gravity**, would prove **gravity** is **quantum**. The problem is that **gravity** is extraordinarily weak.

## Is anti gravity possible?

Aside from the long-running **Anti Gravity** column in Scientific American, however, there is no such thing as **antigravity**. **Gravity** is a force arising among any two masses in the universe. ... As of yet, no technology exists to neutralize the pull of **gravity**.

## Can we explain gravity?

**Gravity** is a force of attraction that exists between any two masses, any two bodies, any two particles. **Gravity** is not just the attraction between objects and the Earth. It is an attraction that exists between all objects, everywhere in the universe. ... where G is called the **Gravitational** Constant.

## Is gravity an illusion?

In part, **gravity** is an **illusion**. In part, it is associated with a quantity called “curvature”. Overall, **gravity** is intimately connected with the geometry of space and time.

## Is gravity a wave or particle?

Now, we come to gravitational waves. These are sort of unique, because we've only seen the wave-like part of them, never the particle-based part. However, just like **water** waves are waves that are made of particles, we fully expect that gravitational waves are made of particles, too.

## Can gravitons be dark matter?

We consider the possibility that the massive **graviton** is a viable candidate of **dark matter** in the context of bimetric gravity. We first derive the energy-momentum tensor of the massive **graviton** and show that it indeed behaves as that of **dark matter** fluid.

## Does gravity have a frequency?

The **gravitational** wave spectrum In general, **gravitational** wave **frequencies** are much lower than those of the electromagnetic spectrum (a few thousand hertz at most, compared to some 1016 to 1019 Hz for X-rays).

## Does gravity exist at the quantum level?

Of the universe's four fundamental forces (**gravity**, electromagnetism, and the strong and weak nuclear forces), only **gravity** lacks the "**quantum**" description. As a result, no one knows for sure (although there are plenty of ideas) where gravitational fields come from or how individual particles act inside them.

## Who invented quantum gravity?

Giovanni Amelino-Camelia

## Why is gravity not a force?

**Gravity** is most accurately described by the general theory of relativity (proposed by Albert Einstein in 1915), which describes **gravity not** as a **force**, but as a consequence of masses moving along geodesic lines in a curved spacetime caused by the uneven distribution of mass.

## Why gravity is so weak?

**Gravity** is a real weakling – 1040 times **weaker** than the electromagnetic force that holds atoms together. ... According to string theorists' best ideas, **gravity is so weak** because, unlike the other forces, it leaks in and out of these extra dimensions. We only get to experience a dribble of the true strength of **gravity**.

## What is the strongest and weakest force?

Actually, **gravity** is the weakest of the four fundamental forces. Ordered from strongest to weakest, the forces are 1) the **strong nuclear force**, 2) **the electromagnetic force**, 3) the **weak nuclear force**, and 4) **gravity**.

## Which is the strongest force in the universe?

The **strong nuclear force**, also called the **strong nuclear** interaction, is the strongest of the **four fundamental forces of nature**. It's 6 thousand trillion trillion trillion (that's 39 zeroes after 6!) times stronger than the force of **gravity**, according to the HyperPhysics website.

## Which country has the lowest gravity?

Peru

## Is Earth losing mass?

**Mass loss** is due to atmospheric escape of gases. About 95,000 tons of hydrogen per year (3 kg/s) and 1,600 tons of helium per year are lost through atmospheric escape. ... **Earth** lost about 3473 tons in the initial 53 years of the space age, but the trend is currently decreasing.

## Is Earth's gravity increasing?

"The **Earth's gravity** field changes from one month to the next mostly due to the mass of water moving around on the surface," said Watkins. "Because water in all its forms has mass and weight, we can actually weigh the ocean moving around. We can weigh rainfall, and we can weigh changes in the polar ice caps."

## At what height Earth gravity is zero?

Near the surface of the **Earth** (sea level), **gravity** decreases with **height** such that linear extrapolation would give **zero gravity** at a **height** of one half of the **Earth's** radius - (9.

## How 9.81 is calculated?

The acceleration g=F/m1 due to gravity on the Earth can be **calculated** by substituting the mass and radii of the Earth into the above equation and hence g= **9.**

## Can you create zero gravity on Earth?

Microgravity, which is the condition of relative near **weightlessness**, **can** only be achieved on **Earth** by putting an object in a state of free fall. ... Allowing the experiment hardware to free fall a distance of 432 feet (132 m) **creates** the microgravity environment at the **Zero**-G facility.

## Why value of g is greater at pole?

It is frequently stated that the **value** of the acceleration due to **gravity** at the **pole** is **larger** than at the equator because the **poles** are closer to the center of the earth due to the earth's oblateness. ... The measured **value** is **larger** because the earth's density is not uniform but increases toward the center.

## Where is value of G minimum at poles or at Equator?

The centrifugal force for the spinning of earth is maximum at the **equator** and vanishes at the **poles**. Thus, the gravitational acceleration (**g**) is **minimum** at the **equator** and it is maximum at the **poles**.

## What is the speed of gravity on Earth?

about 9.

## What is the value of G on moon?

approximately 1.

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