If you saw the label "phenylephrine HCl" on a decongestant, would you worry that consuming it would expose you to the strong acid hydrochloric acid, HCl?
A) No, because it is balanced by the phenylephrine.
B) No, because the drug is in the solid phase.
C) No, because this is a salt made using hydrogen chloride, but it is in no way hydrogen chloride.
D) Yes, because of the hydrochloric acid it contains.
Answer: C
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Graphical Analysis: If the velocity versus time graph of an object is a horizontal line, the object is
A. moving with zero acceleration. B. moving with constant non-zero acceleration. C. at rest. D. moving with increasing speed.
The luminosity of the Sun is a measure of:
A) the energy received by the Sun on Earth's surface. B) the energy received by the Sun at the location of Earth. C) the energy received by the Sun at any location in the solar system. D) the energy emitted by the Sun at the photosphere. E) the total energy emitted by the Sun in all directions.
Exfoliation
What will be an ideal response?
What is an unusual theoretical characteristic of quarks?
a. They have fractional charges. b. They are outside the concept of electric charge—it just does not apply to them. c. Even the electron is composed of quarks. d. Even in quantum mechanical terms, quark momentum is not conserved. e. They combine to form leptons.