The diagram shows a transistor used in a circuit.
what does the diagram show?
an npn transistor used as an amplifier
an npn transistor used as a switch
a pnp transistor used as an amplifier
a pnp transistor used as a switch
w
r
o
signal
output
signal
input
r
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Ineed more information about  the question 

maria has a savings account that is earning simple interest. if she started with $200 in the account and has earned a total of $8 in interest in two years, what is the rate of the account? use the formula  .

12.50.080.001250.02

In atoms, the electron carries a negative elementary or unit charge; the proton carries a positive charge. the two types of charge are equal and opposite. in an atom of matter, an electrical charge occurs whenever the number of protons in the nucleus differs from the number of electrons surrounding that nucleus.