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The 2017–2018 North Korea crisis was a period of heightened tension between North Korea and the United States throughout 2017. The crisis began early in 2017 when North Korea conducted a series of missile and nuclear tests that demonstrated the country's ability to launch ballistic missiles beyond its immediate region, suggesting their nuclear weapons capability was developing at a faster ...
Tension is the pulling or stretching force transmitted axially along an object such as a string, rope, chain, rod, truss member, or other object, so as to stretch or pull apart the object. In terms of force, it is the opposite of compression. Tension might also be described as the action-reaction pair of forces acting at each end of an object.
Surface tension is an important factor in the phenomenon of capillarity. Surface tension has the dimension of force per unit length, or of energy per unit area. [4] The two are equivalent, but when referring to energy per unit of area, it is common to use the term surface energy, which is a more general term in the sense that it applies also to ...
The annual summertime exercise comes amid heightened tensions on the Korean Peninsula as the pace of both North Korea’s weapons demonstrations and the U.S.-South Korea combined military ...
GCSE Bitesize was launched in January 1998, covering seven subjects. For each subject, a one- or two-hour long TV programme would be broadcast overnight in the BBC Learning Zone block, and supporting material was available in books and on the BBC website. At the time, only around 9% of UK households had access to the internet at home.
Able Archer 83. Able Archer 83 was a military exercise conducted by NATO that took place in November 1983, as part of an annual exercise conducted in November 1983. It simulated a period of heightened nuclear tensions between NATO and the Warsaw Pact, leading to concerns that it could have been mistaken for a real attack by the Soviet Union.
The First Taiwan Strait Crisis (also known as the Formosa Crisis, the 1954–1955 Taiwan Strait Crisis, the Offshore Islands Crisis, the Quemoy-Matsu Crisis, and the 1955 Taiwan Strait Crisis) was a brief armed conflict between the People's Republic of China (PRC) and the Republic of China (ROC) in Taiwan. The conflict focused on several groups ...
According to Noether's theorem, the conservation of energy is a consequence of the fact that the laws of physics do not change over time. [6] Thus, since 1918, theorists have understood that the law of conservation of energy is the direct mathematical consequence of the translational symmetry of the quantity conjugate to energy, namely time.