That's a sphere.
A curved surface on which all points are the same distance from the center is called a sphere.
That's a circle. The "fixed point" is the center of the circle, and the constant distance is its radius.
The term defined as the distance from the center of a circle to any point on the circle is called the "radius." The radius is a crucial element in the geometry of circles, as it helps determine the circle's size and area. It is half the length of the diameter, which is the distance across the circle through its center.
Motion directly either toward or away from the center is 'radial' motion. Motion where the distance from the center is constant is 'tangential' motion.
A sphere.
The distance from the surface of the Earth to its center is approximately 6,371 kilometers.
The average distance from Earth's surface at the equator its center is about 6378 km. The distance from near the north and south poles to the center is somewhat less.
The distance from surface to surface through the center of a planet would be that planet's "diameter".
The distance between the surface at the center of a reflective surface and its focal point is equal to half the radius of curvature of the surface.
A curved surface on which all points are the same distance from the center is called a sphere.
7,000 km
It is the average distance between the centres of the two objects.
That's a circle. The "fixed point" is the center of the circle, and the constant distance is its radius.
No, the radius of gyration is not a constant quantity. It depends on the distribution of mass and the shape of the object. It is defined as the root-mean-square distance of the objects' parts from its center of mass.
The locus of points where the potential due to an isolated point charge is constant is a spherical surface centered on the point charge. This is because the potential decreases with distance from the point charge, so points at the same distance will have the same potential.
The distance from the Earth's surface to its center is approximately 3,963 miles.
The distance between the focal point and the center of a circle is called the radius. It is a fixed distance that remains constant for a given circle.