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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 does low specific gravity means in materials?
It means that the material has a low density. The practical implication is
that a lot of it doesn't weigh much.
How does the mass of the plnnet affect its gravity?
According to newtons formula;
force F=G*m1*m2/(r^2) ,for 2 bodies facing each others gravitational pull
When divided both sides by m1,so
gravitational acceleration g=m2*g/(r^2)
so
g is directly proportional to mass of the body....
How does no gravity affect no oxygen?
the air pressure is different where if the gravity substances were to change it will be normal
Why gravitational force reduces towards the centre of earth?
The force of gravity on you is zero anywhere inside a homogeneous spherical shell
of mass. Because for every speck of mass in the shell toward which you're attracted,
there's enough mass elsewhere in the shell, arranged in the right shape, to attract you
with an equal force in exactly the oppositedirection.
If you're below the Earth's surface, everything outside of where you are comprises
a spherical shell, and the acceleration of gravity at any radius inside the Earth is the
result of the smaller sphere that's inside that radius, as if the rest didn't exist.
So as you descend into the Earth, the acceleration of gravity where you are
continuously decreases.
That's kind of satisfying in a way . . . The highest value for the acceleration of
gravity associated with a planet is what you encounter on the surface, and it
decreases if you either rise off of the surface or descend below it.
How does acceleration due to gravity changes with altitude?
The acceleration of gravity ... on or near the Earth, for example ... is inversely
proportional to the square of the distance from the center of the Earth. So it
diminishes as you rise from the surface.
When you have ascended to an altitude of one Earth radius ... about 4,000 miles ...
your distance from the center is then two Earth radii, so the acceleration of gravity has
shrunk to 1/4 of its value on the surface.
What is earth's gravity vs the moon?
If you mean which has the stronger gravitational pull, its the Earth since it's much larger than the moon. The moon has about 1/4 of the gravitational pull that the Earth does. But its enough to affect the water on Earth. Which is how we get our tides in the ocean.
Where is highest gravity on the earth?
That would have to be as close to the north or south pole as you can get
and be at Mean Sea Level at the same time.
-- Because of the Earth's oblateness, the ' R2 ' term is smallest at the poles.
-- The aggregate effect of the Earth's total mass decreases as you rise above the
surface, because of the increase in the ' R2 ' term.
-- It also decreases as you descend below the surface, because of the decrease
of the portion of the ' M1 ' term that's inside your present radius.
Note:
The Earth's spin may influence your apparent weight in different ways at various latitudes,
but has no effect on the value of M1M2/R2 , which is what you're asking about.
How old are the characters in the show gravity falls?
All I know is that Dipper and Mabel are 12 years old.
How old is Mabel and dipper pines from gravity falls?
They are 12 before the end of Weirdmageddon and they have their 13th birthday in the events after.
Are you on the moon heaver of lighter than on the moon?
An object is lighter on the moon because the moon is smaller and thus lighter than the Earth
Why can the earth have a stronger pull than the sun?
Gravitational pull is created by mass, but decreases exponentially with the distance between centers of mass. So although the Sun is much more massive, it is comparatively so much farther away that for any object sufficiently close to Earth, the Earth will exert a stronger force of attraction.
This allows the planet to retain its atmosphere and keeps objects on its surface, and keeps the Moon and artificial satellites in orbit. At some point closer to the Moon than to the Earth, the same effect makes lunar gravity greater than that of the Earth.
How has gravity affected man kind?
It has had the convenient effect of keeping most people on the Earth as they go
about their daily activities, as well as the Earth's atmosphere. This has had all sorts
of fortunate consequences and convenient results, such as the ability to walk, drive,
and breathe. These effects have made it a lot easier for mankind and also its women
to evolve, survive, and thrive as a species, and also to enjoy his leisure time with
activities such as fishing, baseball, track and field, NASCAR, and bowling, none of
which would be easy without gravity.
Also, the help we get from gravity as we strive to maintain proper nutritional balance
can not be ignored. Have you ever had the experience where you are not feeling quite
up to snuff, then you tentatively have a snack, and you're forced to remark that you are
"... having trouble keeping this down ..." ? It should take only a moment's reflection to
realize how dire indeed would be our straits in those situations were we without gravity.
How did gravity play a role in the creation of your sun?
Gravity pulled pieces from the Solar Nebula together causing the hydrogen and helium atoms to start nuclear fusion which eventually created the sun.
What does center of gravity have to do with sports?
if there is no center of gravity, then the equipment we use will just float in the air. And if this happens we wont be able to play that sport ever again!
(KIDDING ABOUT THE LAST SENTENCE!)
What's missing in all of these numbers is the height of the ball as it leaves the bat.
Let's see what we can determine without it:
-- The ball's vertical speed as it leaves the bat is 136 x [ sin(30) ] = 68 ft/sec.
-- The acceleration of gravity is 32.2 ft/sec2 .
-- At 68 ft/sec, the ball will rise for 68/32.2 seconds, turn around, and drop back to
the height of the bat in the same amount of time. So it's above the height of the
bat for 68/16.1 = 4.224 seconds after the hit.
-- The ball's horizontal speed is 136 x [ cos(30) ] = 117.779 ft/sec.
-- In the 4.224 seconds the ball spends above the height of the bat, it travels
4.224 x 117.779 = 497.5 feet from home plate.
-- The ball most likely does clear the 10-ft wall 400-ft from the plate, since it travels
97.5 ft farther than that before it has dropped back to the height of the bat.
-- I could put a finer point on it by calculating how far the ball drops during the
last 97.5-ft of its horizontal flight. But I don't feel like it right now, and I leave
that refinement to the purists.
Where did gravity come from. What did Gravity come from. and When did Gravity come into being?
Of those three questions, the only one that makes any sense is the last one. Gravity doesn't come from a place (the "Where" part) or a thing (the "What" part).
Gravity is strongly suspected to have come into existence at the time of the Big Bang, along with the other three fundamental forces. If the Theory of Everything people are right, at extremely high energies the forces combine; gravity would probably have been the first to separate out, at about one Planck time after the Big Bang (a "Planck time" is about 5 x 10-44 seconds).
Does the center of gravity always lies on the body?
No. For example, a ring has a center of gravity in the center of the ring, not on any part of the ring.
Does the center of gravity always lie on the body?
The center of gravity always lies within an object, and is the location at which the entire mass can be considered acting at a single point.
For a system of more than one object, the center of gravity can lie anywhere between the farthest points of the objects, depending on the distribution of mass. The center of mass is called the barycenter.
