Physics gravitational constant
In 1665, Isaac Newton recognized that all matter attracts all other matter, but he also recognized that the gravitational attraction of everyday objects for each other was far too small to be measured in his time. Newton tested his theory of gravitation with the large masses of astronomical objects like…
Gravitational force equation Physics
When you drop an object from some height above the ground, it has an initial velocity of zero. Simple equations allow you to calculate the velocity an object falls after a given period of time and the velocity it reaches at a given displacement. The equations assume that air resistance is negligible…
Define gravitational pull
Yet stick a girl on live telly, and it s as if the cameras exert some weird gravitational pull on her blouse.A star wobbles on its axis when orbiting bodies like planets exert gravitational pull (force of attraction between bodies of matter).The suggestion is the moon s gravitational pull affects the…
Dark energy and Dark Matter
I ve been reading many clever answers here about dark matter and dark energy that called my attention to this question. Since Einstein s theory relates matter and energy as different states of the same thing, is it valid to think about dark matter and dark energy in the same way? Are they two states of the same dark thing ? Are they interchangeable? The short answer to your…
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Define matter in science
Matter is everything around you. Atoms and molecules are all composed of matter. Matter is anything that has mass and takes up space. If you are new to the idea of mass, it is the amount of stuff in an object. We talk about the difference between mass and weight in another section. Matter is sometimes related to light and electromagnetic radiation. Even though matter can be…
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Newton law of universal Gravitation equation
Newton’s Law of Universal Gravitation is a fundamental physical law. We experience its effects everywhere on this planet, and it is the prime mover in the vast world of astronomy. It can also be expressed in a relatively simple mathematical formula on which SAT II Physics is almost certain to test you. Gravitational Force In 1687, Isaac Newton published his Law of Gravitation…
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Dark matter and antimatter
Here I will explain the difference between matter, anti matter, dark matter, and negative matter in a concise and understandable way. I have seen confusion pop up in various online forums and comments on the recent announced trapping of an anti atom by CERN. The first thing to know is that for a physicist there are four fundamental forces of nature which are always at work…
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Gravitational field strength formula
We have already met gravitational fields, where the gravitational field strength of a planet multiplied by an objects mass gives us the weight of that object, and that the gravitational field strength, of Earth is equal to the acceleration of free fall at its surface. We will now consider gravitational fields that are not uniform and how to calculate the value of for any given…
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