Answer the following question given this paragraph: Figure 20.4 Current I is the rate at which charge moves through an area A , such as the cross-section of a wire. Conventional current is defined to move in the direction of the electric field. (a) Positive charges move in the direction of the electric field and the same direction as conventional current. (b) Negative charges move in the direction opposite to the electric field. Conventional current is in the direction opposite to the movement of negative charge. The flow of electrons is sometimes referred to as electronic flow. Q: Positive charges move in the direction of the electric field and the same direction as what current? Choices: - alternating current - direct current - relativity current - conventional current A:
conventional current
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Answer the following question given this paragraph: The lithosphere is the brittle crust and uppermost mantle. Q: Where part of the atmosphere is the uppermost mantle? Choices: - troposphere - thermosphere - isosphere - lithosphere A:
lithosphere
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Answer the following question given this paragraph: Q: What is the name of the portion of a nucleotide lacking phosphate groups? Choices: - nuclear shell - a nucleobase - nucleolus - a nucleoside A:
a nucleoside
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Answer the following question given this paragraph: in a one-liter container (Figure 22.15). In this case, the force exerted by the movement of the gas molecules against the walls of the two-liter container is lower than the force exerted by the gas molecules in the one-liter container. Therefore, the pressure is lower in the two-liter container and higher in the one-liter container. At a constant temperature, changing the volume occupied by the gas changes the pressure, as does changing the number of gas molecules. Boyle's law describes the relationship between volume and pressure in a gas at a constant temperature. Boyle discovered that the pressure of a gas is inversely proportional to its volume: If volume increases, pressure decreases. Likewise, if volume decreases, pressure increases. Pressure and volume are inversely related (P = k/V). Therefore, the pressure in the one-liter container (one-half the volume of the two-liter container) would be twice the pressure in the two-liter container. Boyle's law is expressed by the following formula:. Q: Boyle discovered that what property of a gas is inversely proportional to its volume? Choices: - temperature - amount - mass - pressure A:
pressure
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