How much does the earth weigh exactly?
101436
The mass of the Earth is roughly 5.9742 E24 kilograms.\n\nWhy the need for such an accurate number?
537931
The weight of the Earth is not increasing each year due to the population increase.\n\nFirstly, the net weight of the Earth is probably maintained as the weight increase in the population is offset by the loss in weight of food consumed.\n\nSecondly, if you compare the weight of the 6 billion people to the mass of the Earth, it is negligible. Something like 0.000000000006%.\n\nSome Calculations.\n\nMass of Earth = 5.9742 × 10^24 Kg\n\nThat's 5,974,200,000,000,000,000,000,000 Kg\n\nIf we take 6 billion people on Earth with an average of 60 Kg per person.\n\n6,000,000,000 x 60 kg = 360,000,000,000 Kg\n\nThe whole of 6 billion people will only contribute a miserable 0.000000000006% to the Earth's mass.
408176
Well, the weight of an object is inversely proportional to the distance sqaured.  According to Newton's Law of Graviation, F = (G * m1 * m2) / (r^2), in order to cut the force (or someone's weight) in half, the distance has to increase by the square root of 2, or 1.41ish.  Earth's radius is 3963 miles, so 1.41 times that is 5604 miles.  But that's the distance away from the core.  To get the altitude, subtract earth's radius.  You get an answer of 1641 miles above Earth's surface.  Hope this helped!
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!
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.
441441
Be careful not to confuse the concept of weight with the concept of mass. The Earth's weight would depend on the acceleration due to gravity (Here on Earth we call it 'little g' and it's 9.8 m/s squared) on the enormous planet with a huge bathroom scale that you could set the whole planet Earth on. The Earth's mass doesn't change (except for increasing steadily due to cosmic dust accumulation) when you move it from gravitational field to gravitational field.  Likewise your weight changes when you walk on the moon, but your mass stays the same. It's the different acceleration due to gravity  (The moon's instead of the Earth's) that changes your weight.
701530
Plug the numbers into the Newtons Equation :\n\nF =  (GMm) / r^2\n\nF = Gravitational Force / weight  \nG = Universal gravitational constant   6.673*10^-11 (note the - sign on the exponent)\nM = mass of earth (kg)                 5.98*10^24 kg\nm = mass of satellite (kg)             150kg\nR = radius of earth    (m)             6,378,137 m\nh = height above earth (m)             12,800,000m\nr   = h+R\n\nThe answer will come out as the weight being @ 162.67N\n\nNot weightless, although someone standing on the satellite would feel weightless as its in continuous free fall.\n\nEver been in an elevator and felt lighter as it falls or been weighless on the big dipper as it plummets?\n\nThe gravitational force (weight) of 162.67N is what keeps it in orbit and prevents it from flying off at a tangent. Basically it pulls the satellite towards the earth but the satellite is travelling so fast it misses and continues round in its orbit.\n\nAdded:\n\nWeight is measured in Newtons and is the attractive force between the two masses. (M & m)\n\nIn this case the earth and the satellite. A 1 Kg mass on the surface of the earth will be pulled towards the earth's centre with a force of 9.8N, therefore its weight at ground level is 9.8N. If you plug take m as 1kg, h as 0 and plug them into Newton's formula should get the answer 9.8N, which is where we get the constant g from. \n\nAs you get further away from the centre of the mass the gravity field decreases in inverse proportion to the distance squared. Hence the divide by r^2 on Newtons fornula. Therefore the weight of a 1Kg mass at 12,800km is 1.08N.\n\nBecause the satellite is in a stable orbit the opposing forces of the satellite trying to escape orbit and the gravitational pull towards the earth are equal so yes the weight is 162.7N and the centrefugal force is 162.7N. This is the correct answer to the problem. \n\nAs an aside; for simplicicities case in this scenario the mass of the satellite can be regarded as constant due to its relatively low velocity compared to the speed of light. \n\nHowever as you come closer to the speed of light mass increases according to Einstein's theory of relativity, eventually reaching infinity at light speed.
752935
Mass is a fundamental quality. No matter where something is, it has the same mass. Weight, on the other hand, is the force that gravity exerts on the mass. Though in standard units we measure both in pounds, technically mass is measured in pounds mass, while weight is measured in pounds force. In SI units, mass is measured in grams, and weight in newtons.\n\nTo answer your question, weight will change with distance from the earth's center. Mass will not.
681101
5.98 sextillion metric tons\n\nEarth's Weight (Mass): 5.972 sextillion (1,000 trillion) metric tons. That's 5,972,000,000,000,000,000,000 tons! Actually, scientists prefer to refer to this measurement as the Earth's mass instead of weight since weight is the result of Earth's gravitational pull on another object. And the Earth cannot pull on itself! As the Earth orbits the Sun, it is weightless. If the Earth were placed on the Sun, it would weigh more than if it were placed on Jupiter, the largest planet in the solar system but much smaller than the sun. Yet, Earth (or any other object for that matter) would have the same mass regardless of where it is located.\n\nAge: About 4.5 Billion Years Old\n\nDistance from the Sun (average): About 93.1 million miles (also one Astronomical Unit or AU). It is the third planet from the Sun.\n\nFarthest Distance from the Sun: 94.5 million miles.\n\nClosest Distance to the Sun: 91.4 million miles. \n\nSpeed through Space (around the sun): 18.4 miles per second or about 67,000 miles per hour.\n\nSolar Orbit: It takes Earth 365.2422 days to orbit the sun. This is the basis for the year. \n\nRotational Speed: About 1,070 miles per hour at the equator.\n\nRotational Time: It takes the Earth 23 hours, 56 minutes and four (4) seconds to make one complete 360° rotation.\n\nRotational Tilt: 23.5° on its axis, a straight line through the planet from the North Pole to the South Pole. The tilt is in relation to Earth's near circular orbit around the sun.\n\nEarth's Size, Distances & Surface Features\n\nEquatorial Diameter: 7,928 miles\n\nPolar Diameter: 7,901 miles\n\nCircumference: 24,907 miles\n\nSurface Area: 197 million square miles\n\nHighest Point: 29,028 feet above sea level, Mount Everest, formed 60 million years ago, located on the border of Tibet and Nepal in the Central Himalayas in southeast Asia.\n\nLowest Point (on Land): 1,320 feet below sea level, Dead Sea, located on the border between Israel and the West Bank to the west and Jordan to the east. It is so salty -- the saltiest on Earth -- that it is unable to support any type of life.\n\nDeepest Point on Earth: 35,802 feet, Mariana Trench in the Pacific Ocean. The water pressure there is over eight tons per square inch.\n\nEarth's Vital Systems & Elements\n\nSurface Data: 70% covered by water, with the remaining 30% composed of the seven continental land masses.\n\nWater Composition: 97% salt water, 3% fresh water (only .3% of all water is usable by humans).\nTotal Water Supply: About 326 million cubic miles. \n\n~ Oceans: 317 million cubic miles\n\n~ Ice Caps, glaciers: Seven (7) million cubic miles\n\n~ Ground water: Two (2) million cubic miles.\n\n~ Fresh Water Lakes: 30,000 cubic miles\n\n~ Inland Seas: 25,000 cubic miles\n\n~ Soil Moisture: 16,000 cubic miles\n\n~ Atmosphere: 3,100 cubic miles\n\n~ Rivers: 300 cubic miles (Almost all of humans' drinking water comes from rivers.)\n\nAir Composition: 78% nitrogen, 21% oxygen, 1% other content (including greenhouse gases). The element Argon makes up about 93% of the other content, with carbon dioxide - the primary greenhouse gas, accounting for a little over 3%. Argon is an odorless and inert (inactive) gas that is commonly used in incandescent and fluorescent light bulbs to protect the filament. \nGreenhouse Effect: Vital to maintaining Earth's climate and life-sustaining warmth. The Sun's heat is trapped within Earth's atmosphere by the greenhouse gases, mostly carbon dioxide, which enters the atmosphere through the planet's natural carbon cycling and increasingly from human-caused pollution. The increase of carbon dioxide gases in the atmosphere is believed to have caused the Earth's average temperature to rise from 60°F to 61°F in the last few decades.\nEarth's Chemical Composition: \n~ Oxygen: 46.6 %\n\n~ Silicon: 27.7%\n\n~ Aluminum: 8.1%\n\n~ Iron: 5%\n\n~ Calcium: 3.6%\n\n~ Sodium: 2.8%\n\n~ Potassium: 2.6%\n\n~ Magne
103036
We often use the terms "mass" and "weight" interchangeably in our daily speech, but to an astronomer or a physicist they are completely different things. The mass of a body is a measure of how much matter it contains. An object with mass has a quality called inertia. If you shake an object like a stone in your hand, you would notice that it takes a push to get it moving, and another push to stop it again. If the stone is at rest, it wants to remain at rest. Once you've got it moving, it wants to stay moving. This quality or "sluggishness" of matter is its inertia. Mass is a measure of how much inertia an object displays. \n\nWeight is an entirely different thing. Every object in the universe with mass attracts every other object with mass. The amount of attraction depends on the size of the masses and how far apart they are. For everyday-sized objects, this gravitational pull is vanishingly small, but the pull between a very large object, like the Earth, and another object, like you, can be easily measured. How? All you have to do is stand on a scale! Scales measure the force of attraction between you and the Earth. This force of attraction between you and the Earth (or any other planet) is called your weight. \n\nhttp://www.exploratorium.edu/ronh/weight/
1011253
Well, gravity between two objects is proportional to the masses of the objects.  If the Earth gained more mass, objects on Earth would weigh more.\n\nActually, the Earth does gain a bit of mass each year (from dust, micrometeors, and other tiny particles floating around in space).  However, this amount is so small compared to the existing mass of the Earth, that we can't feel the effect.\n\nThere are a lot of things that weigh more than the Earth ... Jupiter, the Sun, any other star.
25445
The earth is APPROXIMATELY round due to gravitational forces.
351568
6.4185×1023 kg, or the equivalent of 0.107 Earths.
489437
What do you weigh at the center of the earth? Zero, because the mass of the earth is pulling you equally in every direction.\n\nYour weight is greatest at sea level. Of course your weight decreases as you go to Mt. Everest, because you are now at a greater distance from the center. \n\nBut as you go down, your weight decreases for a different reason. Now there is mass of the earth above you pulling on you in an upward direction. That is why you weigh zero by the time you get to the center. \n\nIf you are on the surface of the earth or above, the earth's gravity acts as though it is concentrated at a point at the center of the earth. When you are INSIDE the earth, as in Death Valley, earth's gravity no longer acts that way.
4566
The Earth as a whole can be considered a single mass, m1 and another object, for example you, or the moon, or an apple, is considered another mass, m2. The gravity force between them is given as:\n\nF = G*[(m1*m2)/r^2]\n\nWhere G is the Gravitational constant and is equal to:\n6.67x10^-11 N m^2/kg^2\n\nSo the root cause of the Earth's gravity is it's mass and how it pulls on other masses as given by the equation above. \n\nYou can see that with two very massive objects like the Earth and the Sun you get a much bigger force than with smaller masses like 2 people. THat's why the Earth is kept in orbit about the Sun but you don't feel a force pulling you towards other people for example.
781419
I'm sure that information is available on one of the NASA sites, I don't have time to look for it right now.  The gravity of Jupiter has been approximated as 2.5 times the gravity of Earth, but the mass of Jupiter is almost 318 times that of the Earth.  For some reason, I was under the impression that mass and gravity were a direct proportion.  I just found that I was wrong today.  Thanks for asking your question; I just became even smarter that I was.
173277
25 lbs\nThe distinction between mass and weight becomes obvious when we move away from the earth's surface. For example, on the surface of the Moon gravity is only about one sixth as strong as on the surface of the earth. A one kilogram mass is still a one kilogram mass – mass is an intrinsic property of the object. However, the weight of the object – the downwards force due to gravity – is only one sixth of what it is at the surface of the earth; that is, only one sixth of what we would expect one kilogram to weigh.