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Use the Pythagorean theorem to answer this question. Becca paddles a boat from the south bank of a stream to the north bank. She paddles at a rate of 8 mph. The stream is flowing west at a rate of 6 mph. What is Becca’s actual velocity?

Since a stream of water is perpendicular to the movement of Becca, her boat must have been moving going at an angle of north east. Using the Pythagorean formula, we can calculate for the resultant velocity, c. c^2 = (8 mph)^2 + (6 mph)^2 c^2 = 64 + 36 c^2 …

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Why was the country-wide spread of a postal system and paper currency important to China? A) to spread the image of the emperor through stamps and coinage B) to keep news and wealth flowing throughout the country C) to unite the Chinese people D ) to give jobs to Chinese postal workers and bankersI actually ended up going with: B) to keep news and wealth flowing throughout the country Havent found out if i was correct or not.

Why was the country-wide spread of a postal system and paper currency important to China? A) to spread the image of the emperor through stamps and coinage B) to keep news and wealth flowing throughout the country C) to unite the Chinese people D ) to give jobs to Chinese …

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A scientist adds heat to each of the following substances. Which will probably absorb the most heat before its temperature changes significantly? 50 g of solid copper 50 g of solid iron 50 g of liquid water 50 g of sand Question 2(Multiple Choice Worth 2 points) A drop of water placed on a smooth, dry surface will form a dome-shaped droplet instead of flowing outward in different directions. Which of these best explains this observation? The bonds between hydrogen and oxygen atoms are very strong. The electrons in the atoms attract the electrons in the other atoms. Water molecules at the surface experience fewer hydrogen bonds than water molecules within the liquid. Water molecules near the surface produce more buoyant force than water molecules within the liquid. Question 3(Multiple Choice Worth 2 points) Which of these best explains what happens when the ionic substance calcium chloride (CaCl2) dissolves in water? The oxygen atoms in the water molecules are attracted to the Ca2+ ions. The oxygen atoms in the water molecules are attracted to the Cl− ions. The hydrogen atoms in the water molecules are attracted to the Ca2+ ions. The oxygen atoms in the water molecules are attracted to the H+ ions. Question 4(Multiple Choice Worth 2 points) Which of these statements about water is true? Its atoms share electrons equally. It can dissolve all known substances. Its molecules are farther apart in the solid state than in the liquid state. It has a lower specific heat than nearly all known metals.

The gravitational force Fg between two objects is given by the equation: Fg=(G*m₁*m₂)/r₂, where G=6.67*10^-11 m³ kg⁻¹ s⁻² is the gravitational constant, m₁ and m₂ are the masses of the two bodies and r is the distance between those bodies.  Due to the gravitational attraction the pencil and the eraser will …

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Areas near oceans or large lakes tend to have more moderate climates than do areas far from large bodies of water. Which of these statements best explains this observation? Hydrogen and oxygen atoms share electrons in a water molecule. Lakes and oceans contain dissolved solids. Water has a very high specific heat. Water produces buoyant forces. Question 2(Multiple Choice Worth 2 points) A scientist discovers a new substance. The molecules of the substance form hydrogen bonds with each other. When the molecules lose a lot of energy, the hydrogen bonds hold them relatively far apart. Based on this information, what can the scientist infer about the substance? It expands when it freezes. It is highly colored. It exists only as a gas. It does not dissolve ionic compounds. Question 3(Multiple Choice Worth 2 points) Which of the following properties of water is due primarily to the uneven distribution of charge between the hydrogen and oxygen atoms? its color its taste its ability to dissolve ionic substances its ability to produce buoyant forces Question 4(Multiple Choice Worth 2 points) A drop of water placed on a smooth, dry surface will form a dome-shaped droplet instead of flowing outward in different directions. Which of these best explains this observation? The bonds between hydrogen and oxygen atoms are very strong. The electrons in the atoms attract the electrons in the other atoms. Water molecules at the surface experience fewer hydrogen bonds than water molecules within the liquid. Water molecules near the surface produce more buoyant force than water molecules within the liquid.

The gravitational force Fg between two objects is given by the equation: Fg=(G*m₁*m₂)/r₂, where G=6.67*10^-11 m³ kg⁻¹ s⁻² is the gravitational constant, m₁ and m₂ are the masses of the two bodies and r is the distance between those bodies.  Due to the gravitational attraction the pencil and the eraser will …

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What is the largest river flowing through the congo basin and emptying into the atlantic?

B. largest People began traveling for pleasure in the late nineteenth century when roads improved, trains could carry passengers long distances, and increased incomes allowed people the time and money to travel. By the twentieth century, people all over the world could travel, and travel and tourism became the largest …

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In which calculation would the use of the mass-energy equivalence principle be needed? A. energy obtained from the burning of fossil fuels B. energy given off by a current flowing through a wire C. energy created by the conversion of mass of a uranium sample D. mass of coal burned in order to provide the energy needed for a large city

In evolutionary biology, mimicry is a similarity of one organism, usually an animal, to another that has evolved because the resemblance is selectively favoured by the behaviour of a shared signal receiver that can respond to both.[1] Mimicry may evolve between different species, or between individuals of the same species. Often, mimicry evolves to …

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“Ocean currents result from two processes: the wind on the surface of the water and variation in water temperature and density. These ocean currents are convection currents. Under the tropical sun, water at the equator warms up. At the frigid poles, seawater cools down and sinks. Convection cells are set up with warm water moving along the surface to the poles and deep cold water flowing toward the equator. Changes in the density of ocean waters, caused by changes in salinity re also important in the formation of ocean currents. Ice formation near the poles leaves salt behind in the remaining water. This denser, more saline water sinks, creating its own density-driven currents. Surface winds also set surface currents into motion.” Can you pick the statements that accurately describe oceans currents? Check all the statements that are true. ‘Both the wind and solar energy influence ocean currents.’ ‘Warm water flows away from the equator toward the poles.’ ‘As the salinity of ocean water increases, density decreases.’ ‘Cold water sinks, warm water rises, creating a convection current.’

Answer: The rainfall increases the mineral content of ocean water. Explanation: The minerals in the oceanic water are added by the rainfall through surface runoff. It is a phenomena in which the large volume free flowing water flows over the surface of the soil. This water is not absorbed by …

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