Conventional explosives get their energy entirely from chemistry; the outer shell of electrons.
Nuclear explosives get their energy from the nucleus. There is lots more energy there.
No, Vietnam was LIMITED to conventional weapons only. A limited war.
either a build up of nuclear weapons, or a buildup in conventional weapons
He believed that developing nuclear weapons instead of preparing for conventional war was more cost-efficient.
Conventional means accepted standards. Conventional weapons are normal weapons that most nations possess; warships, airplanes, artillery, tanks, Machineguns, etc. Un-Conventional Weapons are weapons that most nations do NOT possess. Nuclear Weapons would be un-conventional weapons. An un-heard of primitive weapon might be considered an un-conventional weapon. The term can also be applied to warfare itself: Un-Conventional Warfare might be guerrilla warfare; Conventional warfare would be traditional Armies fighting against another Army.
the conventional military is less important than nuclear weapons
a conventional and nuclear military buildup that the Soviets could not afford
About as dangerous as conventional weapons of the same yield, plus the radiation effects.
theoretically the yield of nuclear weapons is unlimited.
Using all conventional (non-nuclear) weapons to search out and destroy enemy forces.
the conventional military is less important than nuclear weapons
The war escalated from a guerrilla war into a conventional war (minus nuclear weapons).
It depends upon what you mean by "conventional" weapons. However, nuclear weapons are far more devastating than conventional weapons because of their inherent atomic components; further are spread over a larger "target" area, thus wreak more havoc and destruction, as in "fall-out" (the aftermath). Just study your history and see what devastation our atomic bomb wroght upon Japan. Conventional? Probably limited in (their) scope of damage.