The principle of uncertainty is best defined as the
A) theory that it will require two separate measurements taken at differing times to assess the motion of a subatomic particle.
B) concept that it is impossible to observe at the same time both the position and motion of a subatomic particle.
C) concept of knocking subatomic particles out of atoms to observe them.
D) study of the subatomic particles and their movement inside the nucleus of an atom.
E) science of the mutability of the universe and all of its particles.
B
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n the nineteenth century, the United States acquired most of what is now the Southwest from which country?
a) Mexico b) Canada c) Spain d) Britain
One of the weaknesses of Hellenistic civilization is that there were no scientific innovations to advance the culture
a. True b. False Indicate whether the statement is true or false
Based on this map, why was it most important for Lincoln to keep the Border State of Maryland from seceding?
A) Maryland's secession would mean losing control of the Ohio River Valley. B) The navy could not afford to extend the Union's ocean blockade to one more coastal state. C) Losing Maryland would leave the Union capital surrounded by Confederate territory. D) Without Maryland, the city of Philadelphia would have no access to a seaport.
Who were Copperheads?
A) Northern Democrats who argued for a cease fire B) Northern Democrats who supported the cause of the Union C) Southern Democrats who opposed secession D) Southern Democrats who freed their slaves E) neutral Democrats who sought to avoid conflict by moving West