What is a doppelganger in literature?

What does water came out from a rock mean in this poem and why is it compared to the radio waltz? time was away and somewhere else. the waiter did not come, the clock forgot them and the radio waltz came out like water from a rock: time was away and somewhere else.

"where are you taking me? " the car hesitated, or rather gave a faint whirring click, as if information, somewhere, was dropping card by punch- slotted card under electric eyes. "to the psychiatric center for research on regressive tendencies." he got in. the door shut with a soft thud. the police car rolled through the night avenues, flashing its dim lights ahead. which statement best describes the intended aesthetic impact of this excerpt? o a. by showing leonard obeying the police car, the author reinforces the theme of surrendering one s individuality. o b. by relating the way the car responds, the author underscores the theme of the dangers of a mechanized of society o c. by having leonard, a seemingly normal person, taken to a psychiatric center, the author injects irony, leaving the reader surprised o d. by showing leonard communicating with another person, the author satisfies his need for human contact, leaving the reader hopeful

How did the industrial revolution shape the beliefs of the romantics