what is the exact amount of earth's gravity (today) ?
345386
it is 9.674677386654578364 m/sec2
993361
Hrmm the problem is "path relative to what frame of reference"?  See, the earth is moving along in a straight line through the curved or warped space of the Sun's gravity well.  But, I guess you're looking for the answer:  straight line.
1011745
The mass of the earth has been calculated as 6 x 10^24 kilograms. (Mass is a little different than weight, but let's not get into that.) Here's a link on how this calculation was done.
61784
That's an interesting qts. I assume that you wish to invlove pure physics in this qts. Forget all the heat at the core of the earth and also air resistance.\nConsider pure gravitation theory.\n\nIf say the fellow who fell in the hole has mass m\n\nThen force of gravity exerted by the earth is :\n\n  F = GMm/(r*r) ..... Where G - universal gravitation constant\n\n                            M - Mass of the earth\n                            r - distance between earth and body of mass m\n\n          acceleration due to gravity\n            = (1-h/R)g   .... where h is distance of body beneath the earth's surface and g is acceleration due to gravity at the surface of the earth.\n\nSo as the body comes closer to the core of the earth, h tends to R.\nSo the acceleration of the body goes on decreasing very much. So, body may not actually hover, since his velocity will be constant the instant it is at the core.
1042618
weight = mass x gravity\n\nso...\n\nweight / gravity = mass\n\nthe gravitational constant on earth is approx. 9 m/s^2
1037575
The Earth is about 12,750 kilometers (km) in diameter.\n\nHere are some answers to some more of your questions:\n\nHow old is the earth?\nThe earth is about 4.5 billion years old. That is 45,000,000,000 years. The sun, the moon, the planets, and nearly everything in our solar system was formed at the same time, so they are all 4.5 billion years old. \nHow does the earth spin?\nIf you look around at planets, stars, and galaxies in the universe you will see that EVERYTHING spins! This is because planets like Earth (and stars and galaxies) formed from a large cloud of gas and dust. As gravity pulled the cloud together, any little bit of spin gets multiplied. This is known to scientists as the Conservation of Angular Momentum. You can try this out yourself. Find a chair that spins easily and sit on it. Start out by spinning with your arms outstretched, then pull them in to your body. Did you notice that the chair started to spin faster when you pulled your arms in? The same thing happens as the planet forms — as its gas, dust, and rocks fall together the planet spins up faster and faster. Later other things can affect the spin. Earth and the moon pull on each other, affecting both their spins and the orbit of the moon. It's quite a dance! \n\nHow fast is the earth spinning and why can't we feel it spin?\nThe circumference of (distance around) the earth is 2 x PI x radius, which turns out to be about 24,000 miles. Since the earth turns once per day (or 24 hours), that is 1,000 miles per hour! We don't feel that because everything else is moving with us and because the motion is very, very smooth. It's kind of like sitting in a car and reading a book or playing a game. If the car is going very smoothly, with no stops or bumps, and you don't look out the window, you wouldn't know you were moving. The only reason we know the earth is turning is because the sun and stars move across the sky. \n\nWhat is the exact tilt of the earth? How much does it change throughout the year?\nThe tilt of the earth is 23.45 degrees. This is measured as the tilt of the earth's equator compared to its orbit around the sun. The amount of the tilt doesn't change with time, but the direction that the earth's poles are pointed does. This is called precession. It is just like the wobbling of a spinning top. The direction that the North Pole (and South Pole) is pointed moves in a circle in the sky very slowly, completing each circle once every 26,000 years. \n\nWhy does only Earth have so much oxygen?\nThat's a very good question — no other planet in the solar system has so much oxygen. The answer is — life! Earth did not originally have a lot of free oxygen in the atmosphere. The oxygen was mostly combined with other elements to make carbon dioxide, water, or in rocks. But as early life evolved, especially plants, well they give off oxygen. So the reason we have so much oxygen in our atmosphere — and we are here and can breathe it! — is due to plant life on the earth! \n\nHow can rockets get through the earth's atmosphere, but comets can't?\nObjects hitting our atmosphere usually burn up because they are hitting it so fast. Usually they are moving at hundreds or thousands of miles per second. Rockets and the shuttle move more slowly (although pretty fast compared to cars on the highway). Here's a comparison. If you jump into a swimming pool from the high board and hit the water really hard, it stings and you make a big splash. But if you step into the water slowly, it feels fine and you make only a little ripple. The same thing happens to meteors — they hit the earth's atmosphere real hard and go splat! \n\nIf a comet hit the earth, what would happen?\nIt could cause a big explosion. The nucleus of a comet is thought to be a mile or two in size. The nucleus is made up of ice and rock, but we aren't sure how solid it is. Something that big hitting the earth from space would be bigger than
371595
approx 19 miles/second.\n\nAny force from centripetal acceleration you might feel would be more than compensated by the gravitational attractions from the Sun and Earth themselves.\n\nIt might be a measureable amount, but just barely.
265928
1.27 X 1022 KG (0.0021 Earths)
25445
The earth is APPROXIMATELY round due to gravitational forces.
677265
The Earth and our body exert forces on each other according to Newton's law of gravity.  Essentially mass attracts other mass.
635298
Well, that depends upon how one looks at MOVEMENT.  This is to say that though we tend to understand movement in relation to distance, to other objects, to speed, and so forth, when comparing movement in relation to the universe, the one all unifying factor of that which exists in a defined reality, actual movement becomes sort of relative, taking direction with it.\n\nBefore I pick out inherent directions of movement, let me explain a little of this subjective relativity.  What if I were to instead ask, "How much does the planet Earth weigh?"  This question similarly depends upon how one looks at the variable of weight.  See, if I ask how much a frying pan weighs or how much a barbell weighs, we can automatically presume that I am talking about its weight on Earth, how it is affected by the pull of the Earth's gravity.  So, how do we judge the pull of the Earth's gravity against the Earth itself?  Some would say you can't.  Others would maintain that the Earth itself weighs nothing, just floating in space.  Still others would determine the mass of the Earth against the pull of the sun's gravity.  Still others could match the whole solar system's weight against the pull of other systems or the pull or push from the center of the galaxy, thereafter attributing the very tiny percentage of mass for which the Earth is responsible in the equation.  Other folks would simply conceptually add up the mass of the planet and imagine what that mass would weigh if it were a great big ball sitting on our planet.  A few creative folks might pit our planet's mass against a gas giant like Jupiter, determining it's weight against that pull of gravity instead of the sun's, as if we were a theoretical super-satellite (moon) of another planet.  \n\nAll these subjective, objective, and conceptual differences come into play when we are talking about things greater than the finite.  Similar questions plague your query about movement.  So, there are not so many answers as there are different things to consider and different ways to look at it.  Here are a few options...\n\n1)  Relative to the sun, the Earth revolves.\n\n2)  Relative to its axis, the Earth rotates.\n\n3)  Relative to the plane of the solar system, the Earth wobbles on its axis.\n\n4)  Relative to a line between it’s own equator and a fixed point on the sun nearest us, the Earth tilts.\n\n5)  Relative in comparison to a planet that always has the same side facing the sun, like Mercury, or in other words, relative points on the surface of the Earth and the surface of the sun, the Earth is in an exaggerated or accelerated spin or spiral away from this presumed connector.\n\n6)  Relative to the galaxy, our solar system moves out from center in the Milky Way, the Earth moving with it.\n\n7)  Relative to other galaxies, our galaxy's mass gets caught in the collective gravitational pull of the mass of others, adjusting the direction and speed in which we travel as a galaxy and thereby affecting our solar system with Earth in it.\n\n8)  Relative to other stars in our galaxy, the Earth's proximity to the sun and small size seems more like a shake or a flicker than a revolution.\n\n9)  Relative to a center of the universe in a single big bang theory, everything, including us, moves on a vector out from center.\n\n10)  Relative to Einstein's use of LAMDA in an equation meant to unify his two theories of relativity; everything also collapses in toward center slightly in a very precise balance against the movement outward.\n\n11)  Relative to a multiple big bang theory, everything moves out from the last center of the last big bang, which in turn was already in a generalized outbound pattern from a previous big bang.\n\n12)  Relative to our branch in the implied spiral of the Milky Way Galaxy, a number of systems are moving in a sort of half-parabola ever slowing.\n\n13)  Relative to the idea of a unified greatness, like a universe, a single,
954663
it has gravity indeed, but less than earth\n\n:> peace\n.
1871
To put it plainly and simply quoted:  \n\nF = Gm1m2/r2 = ma\n\nGm/r2 = g\n\nm = gr2/G\n\nm = (9.8 m/s2)(6.37 x 106 m)2/(6.673 x 10-11 Nm2/kg2) \n\nm = 5.96 x 1024 kg\n\nThe Earth gains mass each day, as a result of incoming debris from space. This occurs in the forms of "falling stars", or meteors, on a dark night. The actual amount of added material depends on each study, though it is estimated that 10 to the 8th power kilograms of in-falling matter accumulates every day. The seemingly large amount, however, is insignificant to the Earth's total mass. The Earth adds an estimated one quadrillionth of one percent to its weight each day.
29637
Scientists are now saying the Earth is a little lighter than we thought. The calculated weight is 5.978 sextillion metric tons, or 5,978 followed by 18 zeros. But the latest measurements show the true weight is actually 5.972 sextillion metric tons. So, does this mean the Earth is losing weight? \n\nActually, the answer is no. The truth is, one of the constants used to calculate the weight of the Earth was off. The force of gravity, shown as the capital letter G, is a little tricky to measure. Scientists have come up with many different numbers, and each one gives us a different number for the Earth's weight. \n\nScientists at the University of Washington found a more precise way to measure G. And now that they have this more exact measurement, they have found the real weight of the Earth - they think. They warn that their findings may still change, so don't use the new weight in your science homework just yet. \n\nWho knows, maybe the Earth is losing weight!
941617
The Specific Gravity of water is 1
1172003
No.  In fact, gravity is not even the same everywhere on earth now, because earth is not a perfect sphere of uniform density.  Local variations in the earth's mass and topography produce local differences in gravity (so you might expect to weigh slightly differently atop Mount Whitney than you would at the bottom of Death Valley).  Also, the earth's gravitational field has not been constant over time due to changes and redistributions of the earth's mass and shape.  The polar ice caps have pushed down the earth beneath them, flattening the poles compared with a perfect sphere.  Even the tides alter the earth's shape and mass distribution on a daily basis.  To the extent that the earth has accumulated meteorites and particles from space, its total mass has also changed over time.  Since gravity is the attraction between two masses and a function of their relative distances, things which change the masses and their respective distances will result in corresponding changes in the measurement of gravity.
12482
weight of earth is 5.9736×1024 kg\n\nOther info about earth:\nAspect Ratio 0.996 647 139 \nEllipticity 0.003 352 861 \n  \nRadius: \nEquatorial 6,378.135 km \nPolar 6,356.750 km \nMean 6,372.795 km \n  \nDiameter: \nEquatorial 12,756.270 km \nPolar 12,713.500 km \nMean 12,745.591 km \n  \nCircumference: \nEquatorial 40,075.004 km \nPolar 39,940.638 km \nMean 40,041.455 km \n    \nSurface Area 510,065,284.702 km² \n Land 148,939,063.133 km² (29.2 %) \n Water 361,126,221.569 km² (70.8 %) \n  \nVolume 1.0832×1012 km³ \nMass 5.9736×1024 kg \nDensity 5,515 kg/m³ \nEquatorial surface gravity 9.780 m/s²\n(0.997 32 g) \nEscape velocity 11.186 km/s \nSidereal rotation period 0.997 258 d (23.934 h) \nRotational velocity\n(at the equator) 465.11 m/s \nAxial tilt 23.439 281° \nRight ascension\nof North pole 0° (0 h 0 min 0 s) \nDeclination 90° \nAlbedo 0.367 \nSurface temperature\n- min\n- mean\n- max \n185 K\n287 K\n331 K \nSurface pressure 100 kPa \nAdjective Earthling or Terrestrial