Q: When you change a magnetic field through electromagnetic induction what do you create? Read this paragraph and choose the correct option from the provided answers: The process of generating electric current with a changing magnetic field is called electromagnetic induction . It occurs whenever a magnetic field and an electric conductor, such as a coil of wire, move relative to one another. As long as the conductor is part of a closed circuit, current will flow through it whenever it crosses magnetic field lines. One way this can happen is pictured in Figure below . It shows a magnet moving inside a wire coil. Another way is for the coil to move instead of the magnet. Choices: - cooling current - microwave current - Light Current - electric current A:
electric current

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Q: In his work with pea plants, mendel performed what, which involves mating two true-breeding individuals that have different traits? Read this paragraph and choose the correct option from the provided answers: These are plants that always produce offspring that look like the parent. By experimenting with true-breeding pea plants, Mendel avoided the appearance of unexpected traits in offspring that might occur if the plants were not true breeding. The garden pea also grows to maturity within one season, meaning that several generations could be evaluated over a relatively short time. Finally, large quantities of garden peas could be cultivated simultaneously, allowing Mendel to conclude that his results did not come about simply by chance. Mendel performed hybridizations, which involve mating two true-breeding individuals that have different traits. In the pea, which is naturally self-pollinating, this is done by manually transferring pollen from the anther of a mature pea plant of one variety to the stigma of a separate mature pea plant of the second variety. Plants used in first-generation crosses were called P, or parental generation, plants (Figure 8.3). Mendel collected the seeds produced by the P plants that resulted from each cross and grew them the following season. These offspring were called the F1, or the first filial (filial = daughter or son), generation. Once Mendel examined the characteristics in the F1 generation of plants, he allowed them to self-fertilize naturally. He then collected and grew the seeds from the F1 plants to produce the F2, or second filial, generation. Mendel's experiments extended beyond the F2 generation to the F3 generation, F4 generation, and so on, but it was the ratio of characteristics in the P, F1, and F2 generations that were the most intriguing and became the basis of Mendel's postulates. Choices: - cross-breeding - assimilation - mutations - hybridization A:
(Answer)
hybridization

Ques: Q: Multiplying the linear momentum of a spinning object by the radius calculates what? Read this paragraph and choose the correct option from the provided answers: The angular momentum of a spinning object can be found in two equivalent ways. Just like linear momentum, one way, shown in the first equation, is to multiply the moment of inertia, the rotational analog of mass, with the angular velocity. The other way is simply multiplying the linear momentum by the radius, as shown in the second equation. Choices: - applied momentum - angular torque - total momentum - angular momentum A:
Ans: angular momentum

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Q: Chemical reactions are typically written to imply that they proceed in one direction - if they can occur in either direction, they are considered what? Read this paragraph and choose the correct option from the provided answers: A chemical reaction is usually written in a way that suggests it proceeds in one direction, the direction in which we read, but all chemical reactions are reversible, and both the forward and reverse reaction occur to one degree or another depending on conditions. In a chemical equilibrium, the forward and reverse reactions occur at equal rates, and the concentrations of products and reactants remain constant. If we run a reaction in a closed system so that the products cannot escape, we often find the reaction does not give a 100% yield of products. Instead, some reactants remain after the concentrations stop changing. At this point, when there is no further change in concentrations of reactants and products, we say the reaction is at equilibrium. A mixture of reactants and products is found at equilibrium. For example, when we place a sample of dinitrogen tetroxide (N2O4, a colorless gas) in a glass tube, it forms nitrogen dioxide (NO2, a brown gas) by the reaction N 2 O 4(g) 2NO 2(g) The color becomes darker as N2O4 is converted to NO2. When the system reaches equilibrium, both N2O4 and NO2 are present (Figure 13.2). Choices: - singular - observable - reactive - reversible A:
(A).
reversible

Ques:Q: The concentration of a substance is the quantity of solute present in a given quantity of ___________? Read this paragraph and choose the correct option from the provided answers: Summary The concentration of a substance is the quantity of solute present in a given quantity of solution. Concentrations are usually expressed as molarity, the number of moles of solute in 1 L of solution. Solutions of known concentration can be prepared either by dissolving a known mass of solute in a solvent and diluting to a desired final volume or by diluting the appropriate volume of a more concentrated solution (a stock solution) to the desired final volume. Choices: - structure - mixture - salutation - solution A:

Ans:solution

Q: Where does evidence that magnetic reversals occur come from? Read this paragraph and choose the correct option from the provided answers: Scientists don't know for certain why magnetic reversals occur, but there is hard evidence that they have for hundreds of millions of years. The evidence comes from rocks on the ocean floor. Look at Figure below . They show the same ridge on the ocean floor during different periods of time. Choices: - snow - Volcanoes - air - rocks on ocean floor A:
rocks on ocean floor