(A)

(B)

(C)

(D)

(E)
$2 - 1$

question 25

Multiple Choice

(a)

(b)

(c)

(d)

(e)


Figure $2 - 1$

-Which switch in Figure 2-1 is usually used to control a doorbell?

• A)graph (a)
• B)graph (b)
• C)graph (c)
• D)graph (d)
• E)graph (e)

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Definitions:

Nucleus

The central and most important part of an atom, containing protons and neutrons and almost all of its mass.

Matter

Anything that occupies space and has mass, composed of atoms or molecules and is the substance that makes up the physical universe.

States

Different forms in which matter can exist, typically observed as solid, liquid, gas, and plasma.

Solid

A state of matter characterized by particles that are closely packed together, resulting in a fixed volume and shape.