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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
Zero gravity does not exist. It is a term used to describe what is better labelled 'micro gravity' - the state of experiencing no apparent gravitational effects.
During free-fall, you experience something akin to micro gravity; you are subject to acceleration under the influence of gravity, but only the apparently up-rushing air provides a clue. Sealing yourself into an un-powered vessel or container before being dropped would give the game away quite quickly; as the container reaches its terminal velocity (when its air resistance, which quadruples when velocity doubles, reaches an equilibrium with gravitational acceleration) and you find yourself standing on its inner surface. As you are not subject to air resistance within the container, your body will attempt to continue accelerating while the container will not, and you will be pressed against its floor.
Micro-gravity can be simulated in an aircraft; flying in a specific arc under power allows the craft to maintain downward acceleration at a rate equivalent to gravitational acceleration for a short time, and its passengers experience free-fall within the confines of the craft without air resistance.
In a free-fall orbit, you also experience no apparent gravitational force. In fact, you are falling toward the Earth (or whichever planet you're orbiting), but with appropriate initial acceleration in the right direction, the arc described by your fall matches the curvature of the Earth - the ground falls away as quickly as you fall towards it and you appear to have no weight.
If you should find yourself stranded in space, many parsecs from any substantial body or mass, you would also experience micro-gravity; you are still subject to the forces of gravity exerted upon you by all the mass in the universe and could actually be accelerating in the direction of the greatest gravitational force. As the force of gravity falls off at a rate equivalent to the inverse square of the distance from the center of mass, forever dividing over distance (therefore always measurable as a non-zero number), anything that is visible and much that is invisible in the night sky is actually exerting its gravitational force upon you, and you are exerting your own gravitational force upon the universe.
What is the difference between gravity and weight?
-- Weight is the force that attracts objects toward each other. When we
talk about 'weight', one of the objects is usually the Earth.
-- 'Gravity' is the characteristic of all mass in the universe that causes the forces.
Gravity is the force whereas weight is the measurement of how much the force gravity affects something.
What is the definiton of gravity?
Gravity is the natural force of attraction between two objects with mass. It is responsible for keeping planets in orbit around the sun and objects on Earth's surface.
Neptune's gravity is 1.14 times the earths gravity. So if you weigh 100 pounds you would weigh 114 on Neptune.
What effect does gravity have on stars?
Gravity pulls gas particle together. As gravity pulls more and more atoms, closer and closer together they eventually begin to fuse together. Once fusion starts on a large enough scale, at star is born.
Center of gravity of an object?
Center of gravity is primarily used in airplane dialog but you have it around you all the time. It is the point of balance in an object when no other force affects it. A couple of examples: a teeter totter is balanced when objects at both ends equal the same weight. If you are on one end and another person is on the other you will notice the heavier person causes the teeter totter to rotate down on the heavy end. If the heavier person moves more to the center the balance is eventually equalized and you have achieved center of gravity. Two...If you balance a standard pencil on your finger the point where the pencil actually balances is the pencils center of gravity. Hope this helps
Yes, water is affected by gravity. Gravity is the force that pulls objects toward the center of the Earth, so water is also pulled towards the Earth's center by gravity.
Why would you weigh less on a high mountain peak than you would at sea level?
The weight of an object is the force of gravity on the object's mass. At the top of a mountain, you are slightly farther from the center of the earth, and so the earth's gravity is very slightly weaker. Thus, you weigh a tiny, tiny bit less at the top of the mountain than at sea level.
The word gravity used a sentence?
Gravity can mean seriousness, or it can mean the physical force that makes a book dropped out of a window fall rather than hang in midair. The following sentences provide examples of both meanings:
- I think you fail to understand the gravity of your situation.
- The moon's gravity is only one-sixth of the earth's gravity.
we all walk on gravity to school
The force of gravitational attraction between the two textbooks is approximately 0.0175 N. This can be calculated using the formula F = (G * m1 * m2) / r^2, where G is the gravitational constant, m1 and m2 are the masses of the textbooks, and r is the separation distance.
What do you do in zero gravity training?
In zero gravity training, astronauts experience weightlessness to prepare for space travel. They practice moving and working in a weightless environment, learn how to use equipment, and adjust to conditions they will face in space. This training helps them adapt to the challenges of working in microgravity.
Formula of viscosity-gravity constant?
<p>You can find a simple equation between density and viscosity <a href="http://www.pipeflow.co.uk/public/articles/Viscosity_And_Density_Units_And_Formula.pdf">here</a>. If the link doesn't work, cut and paste the link below<BR> http://www.pipeflow.co.uk/public/articles/Viscosity_And_Density_Units_And_Formula.pdf<BR>
Hope it helps!
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The pull of gravity on an object's mass is called its what?
The pull of gravity on an object's mass is called its weight. Weight is the force of gravity acting on an object due to its mass.
Does gravity affect everything?
No, it does not affect things that are not solid or things that can hold volume. Such as gas. etc
Identify the characteristic of gravity that is incorrect?
Gravity is a non-contact force that acts between two masses.
Where is the center of gravity of a uniform rod?
The centre of the cross-section, halfway along the length of the rod.
gravity is the earths pull on you. it is located in the center of the earth, and that is why we stand on the ground instead of floating upwards. you dont really feel it pulling on you but its there.
Gravity is one of how many basic forces?
There are four fundamental or basic forces, including the strong force, the weak force, the electromagnetic force, and gravity.
English scientist who formulated the law of gravity?
Sir Isaac Newton formulated the law of gravity in the 17th century. He proposed that every object in the universe is attracted to every other object by a force called gravity, which depends on the mass of the objects and the distance between them.
What are the characteristics of gravity?
The nature of gravity is that a pair of equal attracting forces exist between every pair of masses, whose strength depends on the product of the masses and the distance between their centers..
Where on earth is the force of gravity the lowest?
At the top of the highest mountain.
The force is inversely proportional to the distance between the centers of the masses.
The top of the highest mountain is the farthest you can get from the center of the earth and still remain "on earth".
What is the specific gravity of fluorite?
The specific gravity of fluorite typically ranges from 3.0 to 3.3, depending on the specific composition and impurities present in the sample.
How do you find gravity of an object?
The gravity or weight of one object equals its mass times acceleration due to gravity (usually (9.8 m/s^2) [gravity =mg]
The force of attraction between two objects is calculated by the following formula:
F=G[m1*m2/r^2] - Newton's Law of Universal Gravitation
F=force (N)
G=gravitational constant (6.67428 x 10^-11 N (m/kg)^2)
m1 and m2 = masses of objects (kg)
r=distance between objects(m)
