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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
It means no pumps.
The water must flow just because of gravity.
No, you cannot amplify gravity. It is a function of mass, and a certain mass exerts a certain gravity at a certain distance from the center of mass. To increase gravity, you need to increase the mass or shorten the distance.
(Note that should you move "within" the mass, you create an entirely different circumstance.)
Would dust fall due to no gravity on the moon?
Yes, dust would fall because the moon produces a gravitational field of its own.
What is Io's gravity compared to the earth's gravity?
Io's surface gravity is about 0.18 g, where Earth's gravity is 1.0 g.
What role does gravity play in supernovae?
Ok, a bunch of interstellar dust began to collect in a slightly hotter region of the solar system. The gravitational attraction between these particles began to draw them closer and closer to each other. Since the density near the center of the cloud was constantly increasing, the kinetic energy of the cloud also increased. The outer parts of the dust cloud began to spiral around the center. Eventually, the gas in the center became so hot and dense that it condensed to form our sun, fusing its hydrogen particles into helium. The outer rings of space dust then began to condense at other key points around the sun, maintaining their orbital velocity but being held at a constant distance by the star's gravitational pull. These clouds of dust eventually condensed to form the planets and the asteroid belt. This explains why all the orbital paths of the planets are within a few degrees of the same plane. As for galaxies, just extrapolate that explanation to the next level, replacing the dust particles with stars. Mind-blowingly simple, right?
What is the definition of mass in math?
Mass is the amount of matter present in any given chunk (i.e. size/volume) of space. In mathematical terms, m=F/a (i.e. mass = Force divided by acceleration). This equation is obtained by manipulating Newton's Second law, F=ma.
An object's mass can be measured by first finding the weight of the object, the acceleration due to the gravity of the earth (~9.8m/s^2) and then using "Newton's Second Law" (F=ma, i.e. Force=mass x acceleration) to solve for the mass.
Extra Note:
Because the most often used process of finding the mass of an object requires weighing it, people often confuse the mass of an object as being equivalent to the weight of an object. This is NOT true since weight is a "force", not a quantity of mass. if it where true, then Newtons famous equation, F=ma, would instead be F=m. Which is incorrect.
Interesting Fact:
This confusion is apparent in the European us of Kg (mass unit) for measuring weight. When if fact the proper unit is "Newtons" if they are wanting to find the Weight of the object. However this system still works because the weight and the mass are proportional since the acceleration due to the gravity of the earth does not change.
How was the law of universal gravitation made?
"Natural laws" such as the "law" of gravitation are not made, they are observed or formulated. Isaac Newton is generally credited as the discoverer of the law of gravitation, because he's the one who first wrote down the formula. The attractive force between two objects is proportional to the sum of the masses, and INVERSELY proportional to the square of the distance between them.
Ever since the first caveman fell out of a tree, people have known that things fall. A lot of people attempted to figure out the nature of the relationship, including Aristotle, who got it hopelessly wrong. (Aristotle reasoned that a light object would fall more slowly than a heavy object, because a feather falls more slowly than a stone. )
What is the gravity like on neptune?
To answer this we must start by taking a look at Neptune's mass.
Neptune's mass is about 1.02 x 1026 kg.
It would take over 17 Earths to fill up Neptune, but the gravity on Neptune is only 1.19 times of the gravity on Earth. This is because it is such a large planet (and the gravitational force a planet exerts upon an object at the planet's surface is proportional to its mass and to the inverse of its radius squared).
A 100-pound person would weigh 112.5 pounds on Neptune.
If the object is massive it will gain gravity but if it is large it will lose gravity at a greater rate.
How does gravity make something move across the surface of earth?
the pull of earth's gravity makes any objects fall to the ground.As the moon goes around earth, its gravity pulls on earth causing water in the oceans to move toward the moon.Earths gravity also pulls on the moon.
How can an alien protect itself from the high gravity on planet Neptune?
An alien on planet Neptune could protect itself from high gravity by using technology such as anti-gravity devices or exoskeletons to support its body weight. Alternatively, the alien could adapt to the high gravity over time by gradually strengthening its muscles and bones through regular exercise and physical conditioning.
Where did Isaac Newton do his first experiment?
Sir Issac Newton did his first experiment in a class with a student at canbridge.
Why would we weigh differently on each of the planets?
What we call weight is actually the downward force exerted by gravity. For a planet, the gravity at a point on its surface (or anywhere above the surface) is determined by the total mass of the planet, and the distance from the center of mass. This is actually a "mutual attraction" between a person, or an object, and the planet. Since the masses of the planets are vastly different, their surface gravities (what would give you your weight) are also different.
* Note that for gas giants like Saturn, where the surface is deep within the atmosphere (which actually becomes liquidand solid gas at great depth), the gravity is based on a false "surface" -- the level where the atmospheric density is the same as sea level on Earth. So the measuring point is far from any actual solid surface. If you could stand at that level of Saturn's atmosphere, your weight (the pull of gravity you felt) would be about the same as on the surface of Earth, because you would be very much farther from the planet's center.
How can the value of the acceleration due to gravity can be calculated for any planet?
The basic equtiion is g=(GM)/(r squared). Where G is the gravitational constant, M is the mass of the object, and r is the radius of the object. There are a lot of other factors to include to get a more accurate number, but this equation will get you in the same ballpark.
If an object is moved 14 meters and 83 joules What is the force?
Assuming the force doesn't change, and the force and movement are in the same direction, the energy (the joules) is the product of distance and force. Thus, you just need to divide the energy by the distance.
Why does liquid take the shape of a sphere when in zero gravity and gases does not?
It is due to surface tension. Surface tension is only for liquids. Due to surface tension surface energy is to be minimized only reducing the area. For a given volume sphere has minimum surface area. Hence spherical shape.
How the tidal forces can produce enormous internal stresses in a Jovian moon?
The tidal forces are fairly strong in this case, since (1) Jupiter has a fairly large mass, and therefore a fairly large gravitational field, and (2) the moons are relatively close to the planet.
"Tidal forces" such as those that cause the tides in the Earth's oceans are due to gravity.
The important thing is that there are differences in the strength of gravity felt at various places on a planet or a moon.
For example, the side of a moon that's nearer Jupiter feels a stronger force than the far side. It's these gravitydifferences that produce the stresses.
How is gravity involved with roller coasters?
As the coaster gets higher in the air, gravity can pull it down a greater distance. YoAnswer this question…
It is weaker
How do you find the center of gravity of an irregular shape?
well make your question clear
1.2 or 3 dimentional body
2.find center of gravity by complex problem solving method or simple practical method
well the practical way is simple
hold the object between 2 flat things and try pushing one of its ends. now if it moves freely like a wheel then the line connecting the 2 points is an axis of the object
now try to find another set of points having the same property with respect to the object this will be your second axis
now the point of intersection of such axes is the center of gravity of your body
Meters per second . I don't think there's a "name" for that particular derived unit.(m/s2)
If two objects have an equal mass does a more dense object have a greater gravitational pull?
No. The gravitational force exerted by one massive object on others depends only on its mass. So long as you are outside of the object, its density is irrelevant.
What type of friction holds a penny on surface of book when lift cover?
static friction, friction between two non-moving objects.
