You might be surprised to find, however, that the first seismometer was invented in China in 132 AD by a Chinese astronomer, mathematician, engineer, and inventor called Zhang Heng. The instrument was said to resemble a wine jar six feet in diameter, with eight dragons positioned face down along the outside of the barrel, marking the primary compass directions. In each dragon’s mouth was a small bronze ball. Beneath the dragons sat eight bronze toads, with their broad mouths gaping to receive the balls. When the instrument sensed an incoming seismic wave, one of the balls would drop and the sound would alert observers to the earthquake, giving a rough indication of the earthquake’s direction of origin. The device is said to have been very accurate and could detect earthquakes from afar, and did not rely on shaking or movement in the location where the instrument was positioned. The first ever earthquake recorded by this seismograph was supposedly somewhere in the east. Days later, a rider from there reported this earthquake. Moreover, it had the most wicked ornaments. They don’t make scientific instruments like they used to! Of course, the insides of the seismometer was filled with a sensing mechanism of some sort, the contents of which have been lost in time. In all likelihood, a simple or inverted pendulum was employed, according to experts.
Answer: Chemical compound, any substance composed of identical molecules consisting of atoms of two or more chemical elements
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Answer:
September 2, 1945
Since then, both August 14 and August 15 have been known as “Victoryover Japan Day,” or simply “V-J Day.” The term has also been used for September 2, 1945, when Japan's formal surrender took place aboard the U.S.S
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What were the multiple choice answers need more of a description
Answer:
panic disorder
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In simple words, A panic attack refers to the sudden sensation of deep discomfort or uneasiness that peaks in seconds. It contains both neurological as well as psychological emotional symptoms, or behavioural signals.
Panic disorder relates to frequent, sudden severe anxiety accompanied by at least 1 third of: Constant anxiety for another traumatic event or the consequences of a panic attack or Major changes in actions in conjunction with incidents (e.g. refusing activity or locations for anticipation of traumatic event).
