In the 1920s, the development of practical radio communication was furthered by
A. the use of vacuum tubes.
B. its ability to receive more than just simple pulses.
C. both the theory of modulation and the use of vacuum tubes.
D. the theory of modulation.
E. All these answers are correct.
Answer: E
You might also like to view...
Which of the following groups was the most negatively affected by the enclosing and privatizing of common lands?
A) clergy B) boyars C) rural poor D) country elites
Japanese delegations, sent to Europe in 1873 to study the West's technological and industrial development, were especially impressed with the
a. British navy. b. unification process of Italy. c. German combination of nationalism and military-industrial power. d. politics of monarchies. e. French and German militaries.
The Second Great Awakening refers to a wave of __________.
a) religious revivals b) nationalist movements c) peasant uprisings d) urban riots
Of all the people arriving in the New World from the fifteenth to the eighteenth centuries, the Africans were by far the most numerous, probably outnumbering Europeans two to one
Indicate whether the statement is true or false.