17) With which statement would the author of Excerpt 2 be MOST LIKELY to agree?
A)
The use of the internet has made the world a much
less lonely place.
B)
Social networking gives people a false sense of
friendship and community.
Social networking is a natural way for extremely busy
people to communicate.
D)
Electronic advances over the past decades have
advanced people's social relationships.

Frequency is the number of complete oscillations of a wave per second.

Which of the following is an example of an opposing signal? no examplthates given.   i would say, that traffic lights in a city at major intersections direct the flow of traffic in opposite directions so would be an example.also, stop signs on either side of the same street would be an example. at a train crossing, the light for allowing car traffic in opposite directions or not would be another example.