Answer the following question given this paragraph: AM radio waves are used to carry commercial radio signals in the frequency range from 540 to 1600 kHz. The abbreviation AM stands for amplitude modulation, which is the method for placing information on these waves. (See Figure 24.12. ) A carrier wave having the basic frequency of the radio station, say 1530 kHz, is varied or modulated in amplitude by an audio signal. The resulting wave has a constant frequency, but a varying amplitude. A radio receiver tuned to have the same resonant frequency as the carrier wave can pick up the signal, while rejecting the many other frequencies impinging on its antenna. The receiver's circuitry is designed to respond to variations in amplitude of the carrier wave to replicate the original audio signal. That audio signal is amplified to drive a speaker or perhaps to be recorded. Q: What type of radio waves exist in the 540 to 1600 khz frequency range? Choices: - microwaves - sound waves - fm radio waves - am radio waves A:
am radio waves
Answer the following question given this paragraph: Horner's syndrome is a condition that presents with changes in one eye, such as pupillary constriction and dropping of eyelids, as well as decreased sweating in the face. Why could a tumor in the thoracic cavity have an effect on these autonomic functions? 32. The cardiovascular center is responsible for regulating the heart and blood vessels through homeostatic mechanisms. What tone does each component of the cardiovascular system have? What connections does the cardiovascular center invoke to keep these two systems in their resting tone? 33. Why does smoking increase the risk of heart disease? Provide two reasons based on autonomic function. Why might topical, cosmetic application of atropine or scopolamine from the belladonna plant not cause fatal poisoning, as would occur with ingestion of the plant?. Q: Which part of the body shows does horner's syndrome affect? Choices: - the nose - the tongue - the mouth - one eye A:
one eye
Q: Answer the following question given this paragraph: Zinc is a silvery metal that quickly tarnishes to a blue-gray appearance. This change in color is due to an adherent coating of a basic carbonate, Zn2(OH)2CO3, which passivates the metal to inhibit further corrosion. Dry cell and alkaline batteries contain a zinc anode. Brass (Cu and Zn) and some bronze (Cu, Sn, and sometimes Zn) are important zinc alloys. About half of zinc production serves to protect iron and other metals from corrosion. This protection may take the form of a sacrificial anode (also known as a galvanic anode, which is a means of providing cathodic protection for various metals) or as a thin coating on the protected metal. Galvanized steel is steel with a protective coating of zinc. Q: A protective coating of zinc to prevent corrosion is applied to steel and other metals labeled what? Choices: - polarized - battered - corroded - galvanized A:
A: galvanized
Question: Answer the following question given this paragraph: The most useful quantity for counting particles is the mole. So if each coefficient is multiplied by a mole, the balanced chemical equation tells us that 1 mole of nitrogen reacts with 3 moles of hydrogen to produce 2 moles of ammonia. This is the conventional way to interpret any balanced chemical equation. Q: What is the most useful quantity for counting particles? Choices: - the coefficient - the periodic table - the vector - the mole A:
Answer: the mole
*Question*
Answer the following question given this paragraph: Q: What is the name given to anything that has mass and takes up space? Choices: - organism - molecule - vacuum - matter A:
**Answer**
matter
*Question*
Answer the following question given this paragraph: Atoms are neutral in electrical charge because they have the same number of negative electrons as positive protons. Therefore, the atomic number of an atom also tells you how many electrons the atom has. This, in turn, determines many of the atom's properties. Q: What are atoms called when they have the same number of negative electrons as positive protons in an electrical charge? Choices: - positive - static - negative - neutral A:
**Answer**
neutral