Information: - The Winter War was a military conflict between the Soviet Union and Finland in 19391940. It began with the Soviet invasion of Finland on 30 November 1939 (three months after the outbreak of World War II), and ended with the Moscow Peace Treaty on 13 March 1940. The League of Nations deemed the attack illegal and expelled the Soviet Union from the League on 14 December 1939. - OKMO ("Opytniy Konstruktorsko-Mekhanicheskiy Otdel", Experimental Design Mechanical Department) was the tank design team in the Soviet Union during the early 1930s. Located in Leningrad, it produced the design of the T-26 infantry tank, of which about 12,000 would be produced. Most other designs from the bureau never saw the light of day, but it was here that Mikhail Koshkin, designer of the famous T-34 medium tank gained his early experience. The bureau was gutted in the Great Purge and broken up by the beginning of the Second World War. - Mikhail Ilyich Koshkin (Russian: " ", December 3, 1898, Brynchagi, Yaroslavl Oblast September 26, 1940) was a Soviet tank designer, chief designer of the famous T-34 medium tank. The T-34 was the most produced tank of World War II. He started out in life as a candy maker, but then studied engineering. - The T - 100 was a twin - turreted Soviet heavy tank prototype , designed in 1938 -- 39 as a possible replacement for the T - 35 . The T - 100 was designed by N. Barykov 's OKMO design team at S.M. Kirov Factory No. 185 in Leningrad . The T - 100 was conceived with three turrets and eventually built with two . It was in competition with a similar design - the SMK - but neither were adopted and instead a single turret version on the SMK was ordered as the KV - 1 . All three prototypes were tested at the same time in the Battle of Summa . - The T-26 tank was a Soviet light infantry tank used during many conflicts of the 1930s and in World War II. It was a development of the British Vickers 6-Ton tank and was one of the most successful tank designs of the 1930s until its light armour became vulnerable to newer anti-tank guns. It was produced in greater numbers than any other tank of the period, with more than 11,000 manufactured. During the 1930s, the USSR developed 53 variants of the T-26, including flame-throwing tanks, combat engineer vehicles, remotely controlled tanks, self-propelled guns, artillery tractors, and armoured carriers. Twenty-three of these were series-produced, others were experimental models. - The Battle of Summa was fought between the Soviet Union and Finland, in two phases, first in December 1939 and then in February 1940. It was part of the Winter War and was fought near the village of Summa (now Soldatskoye) along the main road leading from Leningrad to Viipuri. After reading the paragraphs above, we are interested in knowing the entity with which 't-100 tank' exhibits the relationship of 'conflict'. Find the answer from the choices below. Choices: - winter war - world war
winter war

*Question*
Information: - Nuclear weapon designs are physical, chemical, and engineering arrangements that cause the physics package of a nuclear weapon to detonate. There are three existing basic design types. In many existing designs, the explosive energy of deployed devices is derived primarily from nuclear fission, not fusion. (This includes fission of any U-238 tamper or casing due to fusion produced neutrons.) - A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission (fission bomb) or a combination of fission and fusion (thermonuclear weapon). Both reactions release vast quantities of energy from relatively small amounts of matter. The first test of a fission ("atomic") bomb released the same amount of energy as approximately . The first thermonuclear ("hydrogen") bomb test released the same amount of energy as approximately . - The Mark 5 nuclear bomb and W5 nuclear warhead were a common core nuclear weapon design , designed in the early 1950s and which saw service from 1952 to 1963 . - In nuclear physics and nuclear chemistry, nuclear fission is either a nuclear reaction or a radioactive decay process in which the nucleus of an atom splits into smaller parts (lighter nuclei). The fission process often produces free neutrons and gamma photons, and releases a very large amount of energy even by the energetic standards of radioactive decay. - The neutron is a subatomic particle, symbol or , with no net electric charge and a mass slightly larger than that of a proton. Protons and neutrons, each with mass approximately one atomic mass unit, constitute the nucleus of an atom, and they are collectively referred to as nucleons. Their properties and interactions are described by nuclear physics. After reading the paragraphs above, we are interested in knowing the entity with which 'mark 5 nuclear bomb' exhibits the relationship of 'use'. Find the answer from the choices below. Choices: - engineering - mass - nuclear fission - nuclear weapon
**Answer**
nuclear fission