How many years did it take for thomas edison to invent the light bulb?

Which instance of political expression would be considered symbolic speech? a. a student wearing all black to call attention to political issues b. a candidate for congress giving an interview to the media c. a demonstrator chanting anticorporate slogans outside a company’s headquarters d. a local citizen speaking up at a town hall meeting

What did the introduction of silk into the mediterranean do for the abbasid empire

What is propaganda, and how might it be accurate and inaccurate at the same time?