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The cell membrane around a cell forms a barrier that protects and regulates the cell. Certain chemicals can pass through the plasma membrane because they have similar chemical properties as the membrane. Which best describes those that can pass through? They are concentrated. They are soluble. They are diluted. They are heated.

The cell membrane around a cell forms a barrier that protects and regulates the cell. Certain chemicals can pass through the plasma membrane because they have similar chemical properties as the membrane. Which best describes those that can pass through? They are concentrated. They are soluble. They are diluted. They …

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Visit this website and locate the element mercury, whose chemical symbol is Hg. Click on the square to read about the history, properties, and uses of mercury. Name three uses for mercury.

Visit this website and locate the element mercury, whose chemical symbol is Hg. Click on the square to read about the history, properties, and uses of mercury. Name three uses for mercury.

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25. From left to right across a period in the periodic table, elements become less ___________ and more ______________ in their properties. 26. Francium has 36 isotopes, but only francium-223 occurs in nature. Francium-223 spontaneously emits particles and energy, so francium-223 is a(an) _____________ of francium. 27. At sea level, water ______________ at 100°C. 28. Cooking requires continuous addition of energy to the chemical reactions that are taking place. The chemical reactions involved in cooking can be described as __________________. 29. The ________________ theory of matter states that all particles of matter are in constant motion. 30. In Rutherford’s experiments, some of the _______________ aimed at gold atoms bounced back, suggesting that a solid mass was at the center of the atom. 31. You are given the melting points of three unknown substances and are asked to predict which one is an ionic compound. You would select the compound with the ________________ melting point. 32. A flight simulator that helps astronauts prepare for a shuttle launch is an example of a(an) __________________. 33. In the symbol ■([email protected]) He, the superscript 4 is the _________________ for helium, and the subscript 2 is the ___________________ for helium.

25) Answer is: less metallic and more nonmetallic. Electronegativity increases from left to right across a period, atoms have tendency to attract electrons. Electronegativity (χ) is a property that describes the tendency of an atom to attract a shared pair of electrons. 26) Answer is: radioisotope. Radioisotope has an unstable …

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Bio 1 01.04 properties of water

                                          1.04 Properties of Water Question: What effect will adding soap to water have on surface tension?   Hypothesis: If, soap is added to the water slowly dropped on a penny then, the penny will hold more water.   Independent/Dependent/Control Variables: Independent: the amount of soap/oil; Dependent: the penny; Control: …

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Which of the following options is used to view a computer's memory properties? a) Accessories b) Device Manger c) Sytem and Hardward d) Control Panel

Which of the following options is used to view a computer’s memory properties? a) Accessories b) Device Manger c) Sytem and Hardward d) Control Panel

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Name three properties of solids that are different from those of liquids. Explain the differences for each.

1) Solids have a fixed shapeThe particles of solids are held into their positions and are only able to vibrate about fixed points. The strength of the bonding means that the particles have their own shape, which they retain, and do not take the form of the container they are …

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The table describes a gas stored in four different containers. properties of stored gas container properties 1 · low number of collisions with container walls · medium average kinetic energy · large number of particles 2 · large number of collisions with container walls · medium average kinetic energy · small number of particles with little spaces between them 3 · large number of collisions with container walls · high average kinetic energy · large number of particles with large spaces between them 4 · few collisions with container walls · low average kinetic energy · small number of particles which container has gas stored at the highest temperature?

The equation for how temperature changes the resistance R is:  R=R₀(1+α(T-T₀)), where R₀ is the resistance at T₀=20°C, T is the temperature for which we want to calculate the resistance and α is the temperature coefficient for resistance.  The resistance of the copper wire increases by 18% or by 0.18, so the …

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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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Describe essential properties used to define life. which prokaryotic cell structures are involved in carrying out these life processes? explain your answer.

Climate changeGreenhouse effect Some heat energy from the Earth’s surface escapes into space. If too much heat energy escaped, the planet would be very cold. However some gases in the atmosphere can trap escaping heat energy, causing some of it to pass back to the surface. These are called greenhouse gases, …

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In baillargeon’s view, infants have a pre-adapted, innate bias called the principle of _____ that explains their assumption that objects do not change their properties unless some external factor obviously intervenes.

‘D’ and ‘E’ are definitely not good answers. You can’t measure ‘bias’, so ‘A’ and ‘B’ are out of the question. Best answer is C. Because Biased people can change the outcome but gerrymandering is manipulating boundaries. Do not hold me against this answer, this is just my opinion, hope this helps …

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Because atoms of elements in the same group of the periodic table have the same number of neutrons, they have similar properties is this true or false

Answer: a metal an element Explanation: Copper is a metal (it is the chemical element known as Cu, atomic number 29) and is among the first metals discovered by humans, used since ancient times for the production of coins and ornaments. Its color is a reddish orange that arouses interest …

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Which of the following best describes the difference between a mixture and a pure substance? A. A mixture is made up of only one type of atom; a pure substance is made up of more than one type of atom. B. A mixture has different properties throughout; a pure substance has the same properties throughout. C. A mixture has the same properties throughout; a pure substance has the different properties throughout. D. A mixture is made up of more than one type of atom; a pure substance is made up of only one type of atom.

The type of plants that you can expect to see growing first after the flood are small annual plants. Explanation: There are two types of ecological succession, primary and secondary ecological succession. These two successions are created by different factors. A success that is produced by the flood is a …

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3. Compare properties of squares and rhombi to properties of other quadrilaterals by answering each question. Write a brief explanation for each answer. (a) Describe a property of squares that is also a property of rectangles.

Answer: The largest earnings gap between men and women is D. college graduate Step-by-step explanation: Earnings gap between men and women: A. some high school (no diploma) Earnings of men= $479 Earnings of women= $375 Earnings gap= $ (479-375)                      = …

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Compare properties of squares and rhombi to properties of other quadrilaterals by answering each question. Write a brief explanation for each answer. (a) Describe a property of squares that is also a property of rectangles. (b) Describe a property of squares that is not a property of rectangles. (c) Describe a property of rhombi that is also a property of parallelograms. (d) Describe a property of rhombi that is not a property of parallelograms

Posted in Mathematics (a) They are both quadrilaterals with two sets of congruent sides.(b)  A square has 1 set of congruent sides and that includes all 4 sides. A rectangle has 2 sets of congruent sides, 1 for the length sides, and 1 for the width sides.(c). They both have …

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Suppose that ln 2=a and ln3=b. Use properties of logarithms to write each logarithm in terms of a and b ln0.5 …?

10 x 29 = simple you just first put…… 1029Then multiply the 0 by the 9, write it, whis 0, and then the 1 by the 9, which is 9, write that too, then go under it write a 0, then multiply 0 by 2, which is 0, write it, …

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