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The Gravitational Pull Of A Human

admin — Sat, 25 May 2013 00:00:00 +0000

Most people are under the impression that it’s only the large objects that have gravitational pulls. It would explain to them why the Earth and Moon are attracted to each other as opposed to, say, a pencil and a smartphone. However, gravity is one of the four basic forces of the entire universe. It’s a ubiquitous phenominon– meaning it’s found everywhere, in all objects. No matter how big or small, everything has a gravitational pull.
So what would the gravitational pull of something like a human be? Well, it all depends. Gravitational pulls are dependent upon a few factors. One obvious one being the size of the object. The other being the distance apart the two objects are. This is why some moon in a far off galaxy isn’t forcing the Earth out of orbit. It’s too small and too distant.
Let’s assume that there are two people that weigh the average for the planet earth, 62 kilograms (136 pounds) standing roughly a meter (1.1 yards, a little over 3 feet) away from each other. Because humans aren’t massive and a meter isn’t really that proportionately close, the pull is roughly .00000002 Newtons of force. It may not seem like a lot, but it’s certainly there.

How Gravity Is Related To The Ocean’s Tides

admin — Sat, 23 Mar 2013 00:00:00 +0000

When watching the ocean tides go in and out, one canâ€™t help but wonder how it all works. Many people wonder what influence gravity has on ocean tides. Gravity is a major force, and it has a strong influence on ocean tides. Itâ€™s the gravitational attraction of the moon and the sun that affect ocean tides.

Here on this planet, the tidal forces that are witnessed are influenced by gravitational attraction. The distance between objects like this planet and the moon is more important than the mass of these objects. The sunâ€™s gravitational influence on ocean tides is only half the strength of the moonâ€™s gravitational influence. Inertia is the force that counterbalances the gravity.

Moving objects almost always move in a straight line. Inertia and gravity combined create two huge tidal bulges. The gravitational attraction that exists between the moon and Earth is always strongest on whatever side of the Earth that is facing the moon. This gravitational influence that the moon has on the Earth pulls ocean waters towards it.

When the moonâ€™s gravity pulls ocean water towards it, inertia is the force that keeps the water on the Earth. However, the inertia force isnâ€™t quite strong enough to beat the moonâ€™s gravitational pull on the ocean water, which creates a water bulge. The same thing happens on the other side of the Earth, but on that side, inertia beats the moonâ€™s gravitational pull. The end result is a water bulge on both sides of Earth, which creates what humans recognize as ocean tides.

The Gravitational Relationship Of The Earth And Moon

admin — Sun, 17 Jun 2012 00:00:00 +0000

I was in an abnormally busy hospital one night waiting for someone to give birth. One nurse told me we should have had the baby a week ago when they were much less busy; it was the night of a full moon. She told me every full moon guarantees a very long night for them.

So does gravity interaction between the Earth and the Moon actually affect when babies are born? Apparently not. Scientists have hammered the belief with studies and research for years. They claim their results are proof that there is no correlation between full moons and birth rates.

When we go through a full moon, or the highest point of the moonâ€™s gravitational pull, the effects on earth are small and only apply to our bodies of water such as lakes and oceans and the tides within.

Does scientific evidence disprove beliefs that have lasted centuries? It depends on who is asked. The fact that scientific facts are constantly being re-written suggests that maybe we just havenâ€™t tested everything yet. What we know as truth in life is often only theory which has not yet been proven wrong; at-least as far as we know.

Why The Earth Has A Gravitational Pull

admin — Tue, 30 Aug 2011 00:00:00 +0000

Gravity was discovered 3 centuries ago by Sir Isaac Newton. A mathematician and physicist by profession, Newton discovered gravity sitting under a tree and observing falling apples. After further research, Newton discovered that gravity exists between all objects and that gravity is essential for normal life on earth as it helps us from floating away into space.

Gravity exists for many reasons; it keeps the earth rotating in its orbit and keeps it at a certain distance from the sun, keeping our planet at a perfect distance from the sun, preventing it from burning or freezing. Gravity also keeps everything on the earth, from keeping our rivers, lakes and sea water in place it also keeps the essential earths blanket in place that protects us from the sun’s harmful rays.

Astronauts that go into space do not really feel gravity; they float about in their space ships and weight quite different from what they might weigh on the earth. The higher we go, the more gravity exerts its pull on us, the reason why we feel a pull when we look down from a high building. The closer we get to the earth, the lesser the pull of gravity, the reason why formula one car’s are designed with a flat structure.Can’t get enough? There’s more: Governor Swann Totally Looks Like Sir Isaac Newton

What Is The Gravitational Pull Of The Sun?

admin — Sat, 27 Aug 2011 00:00:00 +0000

Gravity is a universal force that binds together planets within solar systems, and keeps our feet on the ground walking around planet Earth. The sun is very important to life on Earth, as it not only provides us with warmth and light, but affects our gravity.

The sun is a very large star, and is the largest celestial object in our solar system. The sun is 1,390,000 kilometers in diameter, so it’s size creates a very large magnetic pull. Thanks to the sun’s huge magnetic pull, it creates gravitation, pulling all the other planets in line with it. The very reason that Earth and the other planets in our solar system experience a regular orbit, is because the sun influences these bodies with it’s huge gravitational force.

In order to find the gravitational pull of the sun, you take the gravitational constant of 6.67 times 10 to the negative 11th power, and multiply it by the mass, and divide that amount by the radius squared. The sun has a mass of 1.99 x 10 kilograms to the 30th power, and a radius of 696,000 kilometers. The gravitational pull of the sun is calculated by following this formula. Try it now!

Some Of NASA’s Zero Gravity Experiments

admin — Wed, 24 Aug 2011 00:00:00 +0000

Since the first astronaut was sent into space, there’s been a great interest in zero-gravity conditions for experiments. Most experiments have focused on how a lack of gravity affects living organisms.
Other experiments have looked at chemical reactions and processes without the presence of gravity. While the International Space Station provides the ideal platform for zero-gravity experiments, NASA and other researchers have conducted many using aircraft in free-fall.
The most important experiments have examined the harmful results of humans living in space for extended periods. Initial experiments showed the loss of bone and muscle tissue to be the biggest problems faced by astronauts. This led to further experiments to discover ways to overcome these problems, such as using resistance exercises.
In studying the behavior of substances under zero-gravity, it’s been found that the surface tension of liquids becomes much stronger. This results in clumps with less smooth flow.
A lot of experiments have been conducted to see how zero-gravity can alter the formation of chemical substances. One material discovered as a result is called aerogel. It has a lower density than anything else known to exist.
The continued use of the international space station guarantees more discoveries in the future.

Teaching Your Kids About Gravity

admin — Tue, 09 Aug 2011 00:00:00 +0000

If your kids have expressed interest in learning more about the world’s gravitational forces it’s time you spent a few moments letting them explore. There are tons of resources out there to help educate them so here are a few of our good parenting suggestions…
Take them to a Science Museum – There are bonafide science museums all over the country and they’re great at getting hands on and interactive with the kids in your life. They can drop things from high heights and find out everything there is to know about how gravity actually works.
Hit the Web – Use your WildBlue Deals internet to teach your kids about Newton…read an online story with them or give them a gravity quiz from one of the dozens of educational websites speaking on this topic.
Do an Experiment – Get outside and learn something together! Go to a height and drop different items – a feather, an apple and a brick – and see what happens. Have your kids guess how long they’ll take to hit the ground then discuss why they were faster or slower than they thought.

Why There Is No Gravity In Outer Space

admin — Mon, 20 Jun 2011 00:00:00 +0000

It’s difficult to imagine a world without a gravity as we all are so used to it that we don’t even pay any attention to its presence. However, in the outer space gravitational pull is so small that it’s negligible and a human won’t even notice it. This is because of nature of gravitational force: it is proportional to masses of objects and inversely proportional to the square of distance between objects, so if you double the distance between objects gravitational force will be only 1/4 of what it used to be. Even though the masses of Earth or Sun are incredibly huge, distances in space are so large that gravitational force acting on a human or even a whole spaceship becomes almost zero, even if it never reaches that exact number. Additionally, if an object is travelling in an orbit, and its acceleration is equal to the gravitational force exerted on it, it will be in the “free-fall” condition forever, never actually falling on an object it orbits. That leads to the fact that astronauts feel weightless at the International Space Station. However objects with large mass like meteorites can still feel gravitational pull of Earth if they come close enough.Still bored? Click to continue: Understanding Gravitational Force in Space

How An Object’s Mass Is Affected By Gravity

admin — Fri, 27 May 2011 00:00:00 +0000

Every object has mass and anything with mass has gravity. We only notice the effect with big things, such as planets and stars. An apple has a gravitational field but it is so tiny that we are unaware of it. Drop the apple and it falls to Earth. This is because the gravitational field of the planet is millions of times more than that of the apple so the effect provided by the apple is drowned out. It exists though.

Now, think about the Earth and the moon. Common understanding is that the moon orbits the Earth. This is not strictly true as they actually orbit each other. The point around which they orbit is about a mile below the surface of the moon.

We all know that the moon exerts an influence on the Earth. This is most obvious with ocean tides where the sea is pulled around depending upon the position of the moon. This is an example of one objects mass, the Earth, being affected by the gravity of another, the moon. Meteors pulled in by Earth’s gravity and increasing its mass, provide an example of how an object’s mass is affected by its own gravitational field.

How Does Gravity Affect A Beam Of Light?

admin — Fri, 20 May 2011 00:00:00 +0000

It was not until Einstein and his General Relativity Theory that anyone thought that gravity could affect light.

Previously, Isaac Newton’s theory was that an object had to have mass to be affected by gravity. Since light does not have mass, under newtonian physics, it would be unaffected by the gravitational pull of an object.

We now know that light’s trajectory can be altered by gravity. According to Einstein’s theory, any object with mass alters the shape of space-time. Anything moving through the fabric of the universe, such as light, will follow the curves already created by the objects warping space-time.You can find a quick rundown here

A popular example to help visualize how four dimensional space-time works is to imagine putting objects on a stretched out rubber sheet. The objects on the sheet push down and create curves in the sheet that are like the curves created by massive objects in space-time.

The reason that nobody, until Einstein, noticed that light can be curved by gravity is that it is very hard to observe. Light moves exceedingly fast. In order for an object to affect light’s trajectory in any way that we can observe, the object creating the gravitational pull has to be truly enormous.