The Chinese people invented the Seismometer during the Han dynasty to help predict natural disasters. The Seismometer measured the motion of the ground, and things included of seismic waves such as, earthquakes, volcanoes, and other things that involve explosions that are generated by seismic waves.
Answer:
Two Weeks
Explanation:
Major Depressive Disorder or simply Depression is a serious mental disorder characterised by periods of low, sunken moods, withdrawal and lack of interest in everyday activities like talking, eating, socializing.
The will to stay alive begins to gradually ebb as the victim is no longer interested in life and begins to withdraw from people.
The victim may also start hallucinating by seeing or hearing things that do not exist.
However for a person to be confirmed as depressed, the symptoms must have lasted for a minimum period of two weeks
B. Slave trading was ended in the District of Columbia
Edge 2020
