The objects are grouped.
Elements
Two dimensional geometry is called "plane geometry" meaning that it occurs on a single surface or plane. The objects used in plane geometry are called plane figures.
A single object cannot be congruent. Congruence is a property of two or more objects.
No. Ceres is single object, not a class of objects. Ceres was long called the largest asteroid in the solar system, but it has since been reclassified as a dwarf planet.
Gravity cannot make objects move on their own, unless they are on a slope or incline. If you mean to ask how gravity holds objects down then that is a completely different question. The more mass a single object has, the more it pulls other objects towards that object. So therefore, the bigger the object the more the gravitational pull.
Weight is due to gravitational forces between two objects. A single object inspace without another one reasonably nearby, or even in gravitational free-falltoward another object, is weightless. So you can not weigh an object in space.Determining the mass of objects in space is another matter.
Solid objects do not have a perimeter because it is not possible to go all round the object in a single path.
In the simplest case, that would be an array. However, many programming languages also have other types of collections - single objects which, in turn, can contain several other objects.
An object at rest. Actually that's the only possible example for a single object. For two objects, you can have objects moving in opposite directions; for example, one may have a momentum of +100 units, and the other, a momentum of -100 units.
An object gives up one or more protons to get a positively charged objects and absorbs one or more electrons to get a negatively charged objects. This happens when two objects are rubbed together (ex. when you rub your feet on the carpet to give some one a shock;rubbing balloon on one's hair)
When two objects meet in motion, there is generally more force created compared to when one object is still. This is because when both objects are in motion, they have momentum which adds to the force of the collision. When one object is still, there is only the force of the moving object acting upon the still object.
In the case a Java, if a variable at the class level (called a "field" in Java) is declared as static, a single copy of such a variable exists, no matter how many objects are created for the class. This lets you share information between different objects; you can also access such a variable without creating a single object, using the class name. A good example are the fields Math.PI and Math.E, i.e., fields in the "Math" class which you can access without creating an object based on the class.