A signal such as a phone call that is sent to a communications satellite by radio waves is called a/an

It would be called a modulation signal. Which is at the sending end, the information to be sent is converted by some type of transducer to a time-varying electrical signal.

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world war i had a devastating effect on german-americans and their cultural heritage. up until that point   german-americans, as a group, had been spared much of the discrimination, abuse, rejection, collective mistrust experienced by so many different racial and ethnic groups in the history of the united states. indeed, over the years, they had been viewed as a well integrated and esteemed part of american society. all of this change with the outbreak of war.