Answer:
Gunpowder, paper, printing, and the compass are sometimes called the Four Great Inventions of Ancient China. Kites were first used as a way for the army to signal warnings. Umbrellas were invented for protection from the sun as well as the rain. ... They invented the abacus in the 2nd century BC.
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Answer: Principle/ A.. sorry if it's wrong can't decide between A and D
Explanation:
Answer:
experimenter bias
Explanation:
The scientist try to eliminate experimenter bias because in experimenter bias experimenter influence the outcomes of participants by giving cues to obtained expected results. Such experiments are biased because in this participants view and response controlled sub-consciously to meet the expected outcomes of experimenter.
Butyric acid smells like sweaty socks. When methanol is added and the mixture is heated, no change is visible but a new odor of sweet apples now fills the room.
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Answer:In 1865 President Andrew Johnson implemented a plan of Reconstruction that gave the white South a free hand in regulating the transition from slavery to freedom and offered no role to blacks in the politics of the South. ... The end of the Civil War found the nation without a settled Reconstruction policy.
Explanation: sorry I don’t know
