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Gravity
One of the four fundamental interactions, gravity is responsible for the fact that any objects with mass attract one another. According to general relativity, it is a space time curvature, but according to quantum mechanics it is the result of exchanges of virtual gravitons.
4,784 Questions
Will the universe eventually contract because of gravity?
At present cosmologists think that dark energy is ripping the universe apart despite the force of gravity so the answer would be NO. However some cosmologists do not accept that dark energy is real and if this is true the answer would be "we do not yet know".
Is there gravity at the center of the earth?
Yes; the gravity from different sides should cancel, for a net result of zero gravity.
What is the force acting on the planets?
Gravity, mainly. The Sun attracts the planets, and - to a lesser degree - the planets attract one another.
Is it true Venus doesn't have enough gravity to have an atmosphere?
No. The gravity on Venus is only slightly less than it is on Earth. Venus has an atmosphere about 90 times denser than Earth's.
What body of evidence that the universal valadity of the law of gravity?
It has been observed in many cases; for example, in the fact that lots of objects move around other objects, in circles, ellipses, parabolas, or hyperbolas. This includes planets and asteroids moving around the Sun; moons moving around planets; the Sun and other stars moving around the center of the Galaxy; etc.
What is the weight of the sun's gravity?
There is no such thing as "the weight of gravity". The Sun's surface gravity is 274 meters per second square, or equivalently, 274 newton per kilogram. This is about 28 "g", i.e., 28 times Earth's gravitational field.
What is the specific gravity of a product that can float?
It needs to be less than the medium in which you float it. Numbers can only be assigned if you specify the conditions and substances.
What does specific gravity measure?
It's basically equivalent to density. More precisely, it's the ratio of the density of a substance, to the ratio of water (or some other reference substance).
What is the reaction force of the gravitational force by earth on a satellite orbiting earth?
According to Newton's Third Law, there is a pair of forces: Earth attracts satellite; satellite attracts Earth. It really doesn't matter which of the two forces you call the "reaction force".
How does gravity affect our lives?
Without gravity we would HAVE NO LIVES. For instance, gravity keeps our Earth together; and gravity is an important component in making the Sun produce energy via nuclear fusion.
Why can we always see the same side of the moon from earth?
The moon rotates and revolves at the same rate
Which two planets would an object weigh more than Earth?
On all the planets with a greater mass than the earth an object would weigh more. All other things being equal.
These are the planets Jupiter, Saturn, Uranus and Neptune in our solar system.
It causes the tides. Tides are also caused - to a lesser degree - by Sun's gravity.
Is the force exerted by the Moon on Earth equal to the force exerted by the Earth on Moon?
Yes for every action there will be an EQUAL and opposite reaction. This is Newton's third law
Does the earth have less gravity than the sun and moon?
Earth has weaker gravity than the sun bu stronger gravity than the moon.
Does refrigeration decrease in urine specific gravity?
Yes, refrigeration can decrease urine specific gravity. When urine is refrigerated, the temperature drop can lead to the precipitation of solutes, particularly crystals and amorphous substances. This can result in a temporary dilution effect, potentially lowering the specific gravity when the sample is analyzed after being chilled. However, the primary components contributing to specific gravity remain unchanged, so any significant alterations usually occur due to the sample's handling or prolonged storage rather than refrigeration itself.
The forces of gravity between two objects fall off as the square of the distance between them.
If you were three times as far from the center of the Earth as you are now,
then the forces of gravity between you and the Earth would be
1 / (3^2) = 1/9 of what they are now.
Putting it simply, your weight would be 1/9 of what it is down here on the surface.
How far does the sun's gravity reach?
In physical terms - to the ends of the Universe.
In practical terms - to the edge, where something more massive has a greater influence.
In "our" terms, about 2 light years from the Sun (But all depends in which direction you are looking (thinking).
How can electricity be similar to space or gravity?
Electricity, space, and gravity are all fundamental forces in the universe that have unique properties and effects on matter. Electricity and gravity both act at a distance, with electricity being a force between charged particles and gravity being a force between masses. Space, on the other hand, is the fabric through which all physical phenomena occur, including the propagation of electricity and the effects of gravity.
What is the force of gravity pulling on humans?
The force of gravity pulling on humans is approximately 9.8 m/s^2, which is equivalent to 1 g-force. This force is what keeps humans grounded on Earth and is responsible for the sensation of weight.
Why is gravity so much weaker than the other 3 forces of the universe?
The other 3 forces of the universe are microscopic and occur within atoms. Gravity, however, is mostly connected with massive macroscopic objects like planets and moons, so appears weaker; however, while the other 3 forces have a very, very short distance of influence on other nearby objects with mass, gravity's force has no real distance limit that we know of. For sure, the center of our galaxy exerts enough force of gravity to keep its billions of star systems rotating around it instead of flying off into space.
