Ques:Q: Motors are the most common application of magnetic force on current-carrying wires. motors have loops of wire in this? Read this paragraph and choose the correct option from the provided answers: 22.8 Torque on a Current Loop: Motors and Meters Motors are the most common application of magnetic force on current-carrying wires. Motors have loops of wire in a magnetic field. When current is passed through the loops, the magnetic field exerts torque on the loops, which rotates a shaft. Electrical energy is converted to mechanical work in the process. (See Figure 22.34. Choices: - electrical circuit - capacitors - spark plugs - magnetic field A:

Ans:magnetic field
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Ques:Q: Upon reaching the postsynaptic membrane, what type of chemical messenger binds to and activates a specific receptor? Read this paragraph and choose the correct option from the provided answers: Choices: - hormone - neuropeptide - pheromone - neurotransmitter A:

Ans:neurotransmitter
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Ques:Q: What are gemstones known as when light cannot pass through them? Read this paragraph and choose the correct option from the provided answers: Most gemstones are not used exactly as they are found in nature. Usually, gems are cut and polished. Figure below shows an uncut piece of ruby and a ruby that has been cut and polished. The way a mineral splits along a surface allows it to be cut to produce smooth surfaces. Notice that the cut and polished ruby sparkles more. Gems sparkle because light bounces back when it hits them. These gems are cut so that the most amount of light possible bounces back. Other gemstones, such as turquoise, are opaque, which means light does not pass through them. These gems are not cut in the same way. Choices: - inorganic - blocking - protective - opaque A:

Ans:opaque
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Ques:Q: In which process do two light nuclei combine to produce a heavier nucleus and great energy? Read this paragraph and choose the correct option from the provided answers: Summary Nuclear reactions are accompanied by large changes in energy, which result in detectable changes in mass. The change in mass is related to the change in energy according to Einstein's equation: E = (m)c2. Large changes in energy are usually reported in kiloelectronvolts or megaelectronvolts (thousands or millions of electronvolts). With the exception of 1H, the experimentally determined mass of an atom is always less than the sum of the masses of the component particles (protons, neutrons, and electrons) by an amount called the mass defect of the nucleus. The energy corresponding to the mass defect is the nuclear binding energy, the amount of energy released when a nucleus forms from its component particles. In nuclear fission, nuclei split into lighter nuclei with an accompanying release of multiple neutrons and large amounts of energy. Thecritical mass is the minimum mass required to support a self-sustainingnuclear chain reaction. Nuclear fusion is a process in which two light nuclei combine to produce a heavier nucleus plus a great deal of energy. Choices: - general fusion - light fusion - certain fusion - nuclear fusion A:

Ans:
nuclear fusion
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