which are two basic point of reference on the surface of the earth
We have several reference points on the Earth's surface, for our convenience. The North and South Poles are a couple. The choice of Greenwich as the zero longitude, and of the International Date Line are another two. These points have no specific feature on the surface, they are decided on for the convenience of the users.
There is no absolute measure for potential energy. The calculation for potential energy depends on the chosen reference level. Quite often, the Earth's surface is chosen as the reference level - in this case, an object on the surface will have zero potential energy.
The surface and shores of the Dead Sea adjacent to Jordan are the lowest points on the earth's surface. Please see the wikipedia article for more information.
200 km
Yes the Earth has a vertical electric field that points down. So if you were to try and calculate the amount of excess charge on the Earth's surface, you would get a negative value.
We have several reference points on the Earth's surface, for our convenience. The North and South Poles are a couple. The choice of Greenwich as the zero longitude, and of the International Date Line are another two. These points have no specific feature on the surface, they are decided on for the convenience of the users.
We have several reference points on the Earth's surface, for our convenience. The North and South Poles are a couple. The choice of Greenwich as the zero longitude, and of the International Date Line are another two. These points have no specific feature on the surface, they are decided on for the convenience of the users.
There are many basic things found on earth's surface.
That depends on what reference level you have chosen. If the (arbitrary) reference level you chose is Earth's surface, then anything on the Earth's surface has zero potential energy. If you choose some higher reference level, an object on Earth's surface has a negative potential energy. If you choose a lower reference level, an object on Earth's surface would have a positive potential energy.
They are the poles.
reference point
They are North Pole and South Pole
Latitude and Longitude
The Earth's center, or a point very close to it inside the Earth, is exactly following the orbit. So there are always two points on the surface that are exactly on the orbit. It seems to me that these points would have to be in the Tropics, and would have to move along the surface as the Earth turns. It's not possible for ANY point on the surface to ever be more than about 6,200 miles from one of these points where the orbit actually meets the surface.
There is no absolute measure for potential energy. The calculation for potential energy depends on the chosen reference level. Quite often, the Earth's surface is chosen as the reference level - in this case, an object on the surface will have zero potential energy.
A system to locate points on the earth's surface.
A system to locate points on the Earth's surface