B low frequency it is the lowest frequency
4ms I'm just guessing by the way
Your answer is 632,100J which is Choice D
I'd guess at valve B. more information about the interesting question would help.
Answer:
Electric current is electric charge in motion. It can take the form of a sudden discharge of static electricity, such as a lightning bolt or a spark between your finger and a ground light switch plate. ... Most electric charge is carried by the electrons and protons within an atom.
Explanation:
because it is
