Answer:
Cannon barrels (the automatic weapon)
Leonardo was seriously concerned by the insufficiencies of contemporary warfare, especially irritated by the time between cannon fire shots, caused by the need for relocation. Leonardo devised a multi-barreled cannon to spin a line of cannons and recharge another: a precursor of the day modern machine gun.
Hallucinogens are <span>psychoactive drugs.
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They mainly affect brain function and result in changes in behavior, mood, thinking, perception, etc.
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Answer:
D) participating in such experiments causes people to develop an enduring distrust of researchers.
Explanation:
Research found out that participating in deception experiments causes people to develop an enduring distrust of researchers.
The reason is that when people feel deceived, they tend to lose trust. In psychology, deception is considered one of the moral issues that consists of misleading someone into thinking opposite to what reality actually is. A human mind would automatically create doubt and mistrust as a result of such activities.
