Cos chapter 13

Submitted by Miranda on Mon, 08/15/2022 - 17:27

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There are 30 questions in this lesson.

	Question	Answer
11	Grounding completes _____________ and carries the current safety away	an electric circuit
12	All the electrical appliances you use should _____________	be UL certified
13	When using _____________, the active electrode is the electrode used on the area to be treated	galvanic current
14	Microcurrent can be used to ________ and restore elasticity	increase muscle tone
15	Only licensed professionals should use _______________	light therapy
16	A wavelength is the distance between successive peaks of ___________ waves	electromagnetic
17	Invisible light is the light at either end of the ___________ that is invisible to the naked eye	visible spectrum of light
18	Ultraviolet C (UVC) light ____________	is blocked by the ozone layer
19	Catalysts are substances that speed up ________	chemical reactions
20	All lasers work by a process known as selective ___________	photothermolysis