How did Einstein describe gravity?

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.