Chemistry, 19.01.2021 20:30 sandyrose935
Two friends at different locations want to communicate with each other by sending low energy signals. Which of the following methods can they use to communicate?
a. Produce x‒rays using colliding electrons and send them to radios, which capture sound.
b. Send messages using infrared radiations, which travel in the form of waves.
c. Send radio waves through intervening media like radio and television.
d. Produce sound waves using microwaves from heated objects.
Answers: 2
Chemistry, 22.06.2019 03:10, lilque6112
Between 2014 and 2016, more than 25,000 children in flint, michigan, drank water that was contaminated with lead from lead pipes. during this time, the city claimed the water was safe to drink. which of these actions could the city have taken to ensure that the drinking water was free from lead?
Answers: 3
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