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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
What helps the Sun keep its shape?
Gravity is the force that makes the Sun and planets roughly spherical in shape. Their rotation, if fast enough, will cause their equators to bulge and their poles to be somewhat flattened.
The sphere is the perfect shape in nature for all fluids. Any body of fluid acted upon only by its own gravity will assume the shape of a sphere, where every point on the surface is equidistant from the center of gravity.
Objects in the solar system are composed of gas, ice, and rock. If they are large enough, they reach "hydrostatic equilibrium" in which their matter is forced together by gravity into a spherical or ellipsoid shape.
What is the gravity on Mars compared to earth?
The gravity of Earth is 2.6 times that of Mars.
Mars's gravity is 38% of Earth's gravity.
Rather than using a pencil, astronauts needed a pen that would write while they were in space. So the pen was invented. On earth, they will write regardless of whether you are upside down or rightside up.
Where on the surface of the earth should you stand to experience the least centripetal acceleration?
Hello, To answer the question, the place where one would experience the least amount of centripetal acceleration would be at either the north or south pole. If you think about it, the part of the Earth that the spins the fastest is at the Equator. The North and South poles move the least while the Earth spins. Centripetal Force is all about making sure that a object on a spinning sphere keeps going around in a circle. If the object spins at a greater rate, the centripetal acceleration would be larger because there is more of a "pull" to keep the object in line.
What is the surface gravity of Jupiter?
Jupiter does not have a solid surface upon which to stand - just many turbulent and increasingly dense layers of gas and liquid - though it may have a very dense, solid core.
However, if you were to stand where the gassy layers give way to liquid (its approximate surface), gravity would be about 25m/s2. That's over two and a half times the gravity on the surface of Earth.
If you weighed 100lbs on Earth (where gravity is 9.8 m/s2), you would weigh about 254lbs on Jupiter, or be around 254% as heavy (or 154% heavier).
This is because, though Jupiter is 318 times the mass of the Earth, it is 11 times greater in diameter. Gravity increases with mass, but decreases with the distance from the centre of mass. The gravitational force is g=m/r2 (gravitational constant x mass of Jupiter x mass of the object, all divided by the distance between the centres of mass squared).
If you could compress the mass of Jupiter down to the size of Earth and attempt to land upon its surface, you would be crushed into oblivion - your weight would be more than 300 times as great as on Earth!
The same thing it is on Earth or anywhere else in the universe . . . the characteristic
of space-time that causes forces of attraction between every two masses.
Gravity on Jupiter is much greater than on Earth because Jupiter is a larger planet, and therefore has much more gravitational pull. Therefore, if you weighed 100 pounds on the Earth, on Jupiter, you would weigh 236.4 pounds. But also the gravitational pull does not count on the size of a planet. While Jupiter is much larger than the Earth, it has a little more than two times the Earth's mass. Saturn, if submerged in water, will actually float because it is less dense than water. Here are more statistics on what a 100 pound person would weigh on other bodies in space:
Mercury: 37.8 lbs
Venus: 90.7 lbs
Mars: 37.7 lbs
Our Moon: 16.6 lbs
Saturn: 106.4 lbs
Uranus: 88.9 lbs
Neptune: 112.5 lbs
Pluto: 6.7 lbs
The Sun: 2,707.2 lbs
White Dwarf Star: 130,000,000 lbs
Neutron Star: 14,000,000,000,000 lbs
Why cant you feel the pull of gravity from Jupiter even though it is massive?
I'm surprised you're not asking why you can't feel a pull toward the Sun,
since it's much closer to us than Jupiter is, and much more massive.
The force of gravity between two objects grows as the product of their
masses grows, and shrinks as the distance between them grows. With
that info, I'll go ahead and do the calculations for you.
I'm going to assume that you have mass that weighs 200 pounds on Earth.
Jupiter
When Jupiter is the closest to Earth that it can ever get, the gravitational
force attracting you and Jupiter toward each other is about 0.00012 ounce.
The Sun
When the Earth is the closest to the Sun that it can ever get, the gravitational
force attracting you and the Sun toward each other is about 2 ounces.
Gravity was discovered by Sir Isaac Newton.
That's like asking who invented planets, or water. Nobody had to invent gravity.
It was always there, but the English Physicist/Mathematician Sir Isaac Newton
gets the credit for explaining how it works, around the year 1700 or so.
People had been aware of gravitatonal force for hundreds of years before English Scientist Sir Isaac Newton wrote his Principia in 1687 which was the first attempt to set out the laws of gravity.
Name three things gravity pulls down from earth?
The earth has gravity that pulls things to itself. The earth pulls human beings, the air we breathe, water, animals, trees, etc., to itself by its gravity.
How does blackhole's gravity is greater than that of earth?
Gravity is technically a measure of mass. To be complex, each atom releases gravitons, which are the carrier particle for gravity, similar to photons being the carrier for electrostatic force. The more gravitons that are released, the stronger the gravity. A black hole is incredibly dense sphere of matter, meaning that if a singularity (a black hole) was the same diameter as Earth, then the singularity would have a much higher mass. This means that there are more gravitons being released form the singularity than Earth, so a much stronger gravitational pull is being created.
Do the poles receive much gravity?
Your choice of the word receive is curious. It's almost as if you equate gravity with, say, rainfall. Do the poles receive much rainfall? is a good question. Do they receive much gravity? is odd.
Although the gravitational constant varies slightly with your position on the Earth as well as your altitude, there is little detectable difference between the force of gravity at the poles compared to anywhere else on the planet. If you weigh 200 pounds in Ecuador, you'll weigh 200 pounds in Antarctica.
The force of gravity is inversely proportional to the square of the distance. That is, if the distance is halved (reduced by a factor of 2), the force will increase by a factor of 22 = 4. Another example: if the distance is increased by a factor of 10, the force will be reduced by a factor of 102 = 100.
Acceleration due to gravity on Earth?
The acceleration due to gravity on Earth is approximately 9.81 meters per second squared (m/s^2). This value can vary slightly depending on location, altitude, and other factors, but 9.81 m/s^2 is the standard value used for calculations on Earth.
Does the force of gravity change at various places on earth?
Yes, the force of gravity can vary slightly depending on factors such as altitude and location on Earth's surface. The force of gravity is stronger at the poles and weaker at the equator due to the shape and rotation of the Earth. Additionally, factors such as topography and density variations in Earth's crust can also cause local variations in gravity.
What is the basis that produces a gravitational force?
since the qn is not answered yet in my opinion the cause of gravity may be the mass of the earth and the particles in it acts as a magnetic particle and all the objects in earth acts as the magnetic materials which are attracted by the earth with aforce of 9.81 m/s^2
Which Europe Cities have exactly 9.80665 MS of acceleration due to gravity?
I do not think that you are completely understanding gravitational acceleration. It was discovered in 1632 by Galileo galilei that all objectd hit the ground at the same time regardless of their mass. It has been said that he conducted this expiriment by dropping cannon balls of the leaning tower of Pisa. The number 9.8066M/S^2 does not alter on this planet. It is a constant speed per every country.
I will no delete the answer provided above, but understand that the number 9.8006 ms^-2 as the acceleration due to gravity is only true for certain places in the world. Newton's universal law of gravitation states that Ag= G (m1*m2)/r^2 . r is the distance between the two objects, and m1 is the mass of one and m2 is the mass of the second, G is the gravitational constant. Now as to which European cities have exactly 9.80665 ms^-2, I really do not know but you could calculate it by using Newton's law of universal gravitation, where r is the distance from city x to the centre of the earth.
http://mtp.jpl.nasa.gov/notes/altitude/altitude.HTML states that 9.80665 is the gravity at sea level at 45.542 degrees latitude, and one might assume that the definition was intended to be what it is at 45 degrees exactly. I assume what you're really asking is how was 9.80665 chosen, and this should answer that. But anyway, major European cities within a degree of 45N: Bordeaux, Lyon Turin, Milan, Belgrade, Bucharest. Cities along this line of latitude on other continents: Novorossiysk, Krasnodar, Halifax, Green Bay, Minneapolis, Portland. Cities near 45S: Dunedin (NZ). Rawson (Argentina).
What in the Earth's gravity makes a compass point north?
It has nothing to do with gravity. The core of the earth is magnetic and the earth's north pole is actually magnetic north... at least for a while. Geologists are telling us that the magnetic field is breaking down. There is evidence that the earth has done that a few times in it's history. Some have even claimed that it is actually the cause of global climate change.
Does specific gravity affect hydrostatic pressure?
Yes, specific gravity does affect hydrostatic pressure. The hydrostatic pressure exerted by a fluid is directly proportional to the specific gravity of the fluid. A fluid with higher specific gravity will exert greater hydrostatic pressure at a given depth compared to a fluid with lower specific gravity.
How does the slingshot effect or gravity work to assist a change in orbit of a spacecraft?
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Nope, that's wrong. An orbit is (by definition) symmetrical. There is no change of energy in an orbit (that is, no change to the sum of kinetic energy and potential energy). Any kinetic energy gained by a spacecraft on approach to a planet, by trading gravitational potential, must be lost on leaving it, as the kinetic energy is converted back into potential.
You can only make sense of a gravity assist by also considering the planet's orbit around the sun. By arranging a suitable slingshot configuration you can steal the orbital energy of the planet around the sun and give it to the spacecraft. The planet ends up in a lower (less energetic) orbit, while the spacecraft ends up in a higher orbit relative to the sun. It has nothing to do with the centripetal force of the spacecraft's orbit or hyperbolic trajectory around the *planet*.
Pressuron theory (2013) by Olivier Minazzoli and Aurélien Hees
two seconds
How does gravity relate to a dreams ability to erode and deposit materials?
Gravity plays a role in the erosion and deposition of materials in dreams by influencing the movement and distribution of those materials. In dreams, gravity can affect how particles are carried away by winds or water, leading to erosion, and how they settle down to form new sedimentary layers, resulting in deposition. Gravity ultimately helps shape the dynamic landscapes and environments encountered in dreams.
What is the downslope movement of rock regolith and soil under the direct influence of gravity?
The downslope movement of rock regolith and soil under the direct influence of gravity is called mass wasting or mass movement. It includes processes such as landslides, rockfalls, and slumps, where materials move downhill due to the force of gravity. These movements can be triggered by factors like heavy rainfall, earthquakes, or human activities.
