Each of the following statements about electromagnetic radiations is true EXCEPT one. Which one is the EXCEPTION?
a. They have a negative electrical charge.
b. They have no mass.
c. They pass through space as particles and in a wave-like motion.
d. They have no weight.
a. Electromagnetic radiations have no electrical charge.
Health Professions
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Which of the following is an indicator of a meth lab?
A. Excessive trash B. Cyanides or acids C. Shrapnel-type materials D. Alterations to building ventilation systems
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When fabricating a custom stent or bleach tray, the best way to accomplish this is by using a __________
vacuform. Cerec machine. lab wheel. lab engine.
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