3) Explica el fenómeno de la transmisión del calor desde el punto de vista de la estructura molecular de la materia.
4) ¿Con qué dos procedimientos podemos variar la energía interna de un cuerpo? Explica cada
mecanismo. No olvides ilustrar para cada caso.
5) ¿Qué son las magnitudes termodinámicas? Define los conceptos de temperatura, volumen y
presión.

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.

An element becomes a positively charged ion when itloses protons.loses electrons.gains electrons.gains neutrons.

Aloop of wire is in a magnetic field such that its axis is parallel with the field direction. which of the following would result in an induced emf in the loop? choose all that apply. a loop of wire is in a magnetic field such that its axis is parallel with the field direction. which of the following would result in an induced emf in the loop? choose all that apply. moving the loop outside of the magnetic field region. spin the loop such that its axis does not consistently line up with the magnetic field direction. change the magnitude of the magnetic field. change the diameter of the loop