Digital signals are generally better than analog signals for transmitting data over long distances for all of the following reasons except: *
A. Digital signals do not use waves, so they do not pick up any noise.
B. Noise can usually be removed from a digital signal.
C. In a digital signal, the level of noise must be high in order for one level to be
interpreted as another level.
D. Digital signals are transmitted faster than analog signals, so there is less chance for
noise to be introduced.

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.