Vector Acceleration and Velocity Vector Position Imagine a moving moving in a random path with an O origin. If we place a Cartesian plane situated on this origin, then we can locate the moving on this path by means of a vector. The vector is called displacement vector and has module, direction and direction.
We call a rigid body or extended body, any object that cannot be described by a point. To know equilibrium in these cases it is necessary to establish two concepts: Center of mass An extended body can be considered a system of particles, each with its mass. The total resultant of particle masses is the total mass of the body.
Closed Chains Closed chains are also called cyclic chains. They present their atoms bonded together forming a geometric figure or ring cycle. They can be classified according to the presence of an aromatic ring or not. - alicyclic or nonaromatic - are closed chains that do not have the bezene ring.
In certain situations, even if there is no physical contact between the bodies, it is possible to feel that something is warmer. Like when you get close to the fire in a fireplace. Thus, we conclude that somehow heat emanates from these "warmer" bodies and can spread in various ways. As we have seen before, heat flow happens from the highest to the lowest temperature.
As for gases, one of the effects of temperature variation is the variation of dimensions in solid and liquid bodies. This variation is what we call Thermal Expansion. Applies only to solid state bodies, and consists of considerable variation of only one dimension. As for example in bars, cables and wires.