What type of electromagnetic wave is used in security pens?
a. x-rays
b. visible...
Chemistry, 07.10.2019 05:30 wedderman8292
What type of electromagnetic wave is used in security pens?
a. x-rays
b. visible light
c. microwaves
d. ultraviolet radiation
Answers: 3
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Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?
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