is dark energy a fundamental force?
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When something is called “dark energy”, it's bound to be mysterious and weird, but dark energy is really weird. ... Some physicists have proposed that dark energy is a fifth fundamental force — adding to the well-known gravity, electromagnetic, weak nuclear and strong nuclear forces.
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However, if we are to be honest, we do not know what gravity "is" in any fundamental way - we only know how it behaves. 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.
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An attractive force that acts between any two objects. Universal Law of Gravitation. "every object in the universe was attracted to every other object with a force (gravity) that is directly proportional to the product of their masses and inversely proportional to the square of the distances between them. "
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It doesn't interact with baryonic matter and it's completely invisible to light and other forms of electromagnetic radiation, making dark matter impossible to detect with current instruments. But scientists are confident it exists because of the gravitational effects it appears to have on galaxies and galaxy clusters.
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The strong nuclear force times stronger than the force of gravity, according to the HyperPhysics website. And that's because it binds the fundamental particles of matter together to form larger particles.
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Is dark energy responsible for the expansion of the universe? No. The expansion would happen without dark energy, but dark energy is causing the expansion rate to increase. The apparent recessional velocities of galaxies at large distances are due mainly to the actual motions of the galaxies through space.
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NO, gravity is not a force, it is the physically unjustified insistence that it is which causes practically all the problems of modern cosmology, most notably a 97% accounting error, thinly disguised as “dark” this and “dark” that.
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Mass, length and time are fundamental physical quantities.
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So, the gravitational force is super tiny. The only way we ever notice this force is if one of the interacting objects has a super huge mass—something like the mass of the Earth (5.97 x 1024 kg). ... The short answer is "yes"—there is gravity in space.
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Newton's law of universal gravitation states that any two bodies in the universe attract each other with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. Density is mass/volume.
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Yes. Although the names sound vague and almost fictional, the types of matter called antimatter, dark matter, dark energy, and degenerate matter are all different, specific entities that really exist in our universe.
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The rest of the universe appears to be made of a mysterious, invisible substance called dark matter (25 percent) and a force that repels gravity known as dark energy (70 percent).
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Black holes provide an important tool for probing and testing the fundamental laws of the universe. All objects exert an attractive gravitational force which depends on their mass.
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It turns out that roughly 68% of the universe is dark energy. Dark matter makes up about 27%. The rest - everything on Earth, everything ever observed with all of our instruments, all normal matter - adds up to less than 5% of the universe.
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The gravitational force is a force that attracts any objects with mass. You, right now, are pulling on every other object in the entire universe! This is called Newton's Universal Law of Gravitation.
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['Gravitational force.', 'Electromagnetic force.', 'Strong nuclear force.', 'Weak nuclear force.']
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Dark Energy. Dark Energy is a hypothetical form of energy that exerts a negative, repulsive pressure, behaving like the opposite of gravity. It has been hypothesised to account for the observational properties of distant type Ia supernovae, which show the universe going through an accelerated period of expansion.