The gravity at its surface increases.
The gravitational force then increases by a factor of 4 .
Gravitational fields do not come to an end, they just get weaker, the farther you go from the mass which creates them. Since our sun (also known as Sol) has existed for about four and a half billion years, its gravitational field extends for about four and a half billion light years. Of course, the field is very weak at that distance, too weak even to detect. In practical terms, the gravitational field of the sun is strong enough to hold some objects in orbit, at distances of several billion miles. Comets orbit at those distances.
The weight of a full moon and a half moon is essentially the same, as both refer to the same physical body, the Moon, regardless of its phase. The difference in appearance is due to the amount of sunlight reflecting off its surface, not any change in mass. Therefore, neither is heavier; they both have the same gravitational pull and mass.
The moon's surface is always half illuminated. We on Earth see 0 to 100% illumination of the side that faces use, depending on what phase the moon is at. Quarter phases, first and last, are half illuminated when seen from Earth.
A hemisphere is a half-sphere, having a curved surface that is half of a sphere. It is a three-dimensional shape with a round, convex surface and a flat base.
The value of the gravitational field strength on a planet with half the mass and half the radius of Earth would be the same as Earth's gravitational field strength. This is because the gravitational field strength depends only on the mass of the planet and the distance from the center, not on the size or density of the planet.
The gravitational acceleration, g, decreases with altitude according to the inverse square law. At an altitude equal to the radius of the Earth (about 6371 km), the value of g would reduce to half of its surface value. This is because the gravitational attraction between the Earth and an object weakens as the distance between them increases.
The gravitational force then increases by a factor of 4 .
When a supernova collapses suddenly, the intense gravitational forces cause the core to shrink rapidly, forcing protons and electrons to combine into neutrons. This results in the formation of a neutron star or a black hole, depending on the initial mass of the collapsing star. The collapse also releases an enormous amount of energy in the form of neutrinos and a blast wave, dispersing heavy elements and enriching the surrounding space.
The weight of an object becomes half at a height where the gravitational force is half of the force on Earth, about 3,578 km above Earth's surface. At this height, the object and Earth are attracted with equal and opposite force.
The surface area of a semicircle has the round surface which is half a sphere and also has the flat surface which is a circle.
because of gravitational pull
A hemisphere is one half of the sphere that makes up Earth's surface.
The half-life of the Earth's magnetic field is estimated to be around 1,000 years. This means that the strength of the magnetic field decreases by half every 1,000 years. The field is generated by the motion of molten iron in the Earth's outer core.
Assuming that by "it" you mean the gravitational force, the amount gravitational force of an object with spherical symmetry (Earth basically has that) on an outside object is the same as if the entire mass (of Earth, in this case) were concentrated in the center.Thus, and assuming you mean you shrank Earth WITHOUT changing its mass, you would get half the distance, and therefore four times the force.
The Earth's surface is made up of water and land. Approximately half of the Earth's surface is covered by water bodies such as oceans, seas, lakes, and rivers, while the other half is covered by landmasses.
No, why should it? There is a powerful gravitational force holding it together.