Determinar la resultante de un sistema de fuerzas concurrentes cuyos modulos son respectivamente 300 N y 450 N que foman entre si un angulo de
160º,indicar Si el sistema se encuentra o no en equilibrio
Justificar

particle   p is an electron and particle q is a neutron

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.