Select the true statement(s) regarding a virtual circuit.

Select the correct statement(s) regarding electrical and electromagnetic (EM) information/signal waves. 

A telephone is an example of:

Convert 85 watt to decibels referenced to 1 milliwatt.

Identify the device that combines multiple time slots or frequency channels into an aggregate for transmission.

Radio Frequency (RF) signals propagate as an electromagnetic (EM) wave.  Optical signals behave as both a wave and as a particle as it propagates.  Although optical waves possess this “wave-particle duality”, they are still considered EM waves.

A switched circuit is one in which a user maintains the physical path through a network during the period of a call.  Once the user’s call is complete, the communications path is made available to other users.

What is the output of this code? class Counter:    count = 0    def __init__(self):        self.count += 1c1 = Counter()c2 = Counter()print(Counter.count)

What is the output of this program? class Data:    values = []    def __init__(self, number):        self.values.append(number)d1 = Data(10)d2 = Data(20)d3 = Data(30)print(d1.values)

The slave codes constructed in Jamaica were instrumental in creating and establishing slave codes in the colonies and then states.