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December 2025

42,840 public questions were asked this month.

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Recent questions

Latest from December 2025

Which statement is true about speed and velocity?(1 point) Responses Both speed and velocity are vector quantities. Both speed and velocity are vector quantities. Speed is a vector quantity, and velocity is a scalar quan...
Asked by Mason 1 answer
During a game of handball, you strike the ball with a mass of .06 kg, and it accelerates to the left at a rate of 13.7 m/s2 . What force did your hand exert on the ball?(1 point) Responses 228 N 228 N 13.64 N 13.64 N 13....
Asked by Mason 1 answer
Howard leans back against a wall with 50 N of force. According to Newton’s Third Law of Motion, what force is being applied and in what direction?(1 point) Responses The wall applies a force of 50 N in the opposite direc...
Asked by Mason 1 answer
A rocket motor is used for different model rockets that have different masses. The results of tests for a rocket motor are shown in the table. Relationship Between Mass and Acceleration Mass (kg) Acceleration (m/s2) 0.09...
Asked by Mason 1 answer
During a game of tug-of-war, two students are pulling on a rope. One student pulls to the left with a force of 35 N, while another student pulls to the right with a force of 35 N. What is the net force being applied to t...
Asked by Mason 1 answer
Which type of decay is a form of nuclear fission?(1 point) Responses beta-minus decay beta-minus decay gamma decay gamma decay alpha decay alpha decay beta-plus decay beta-plus decay
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Question A nucleus decays to produce a nucleus with one additional proton. Which type of decay did the nucleus undergo?(1 point) Responses beta-plus decay beta-plus decay alpha decay alpha decay beta-minus decay beta-min...
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Which statement accurately describes nuclear fission? (1 point) Responses Fission is a process in which two or more nuclei combine to form a larger nucleus. Fission is a process in which two or more nuclei combine to for...
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Question Which statement about the number of protons and neutrons in a nuclear change is correct?(1 point) Responses The relative numbers of protons and neutrons can differ before and after the change, but the total numb...
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Question Hydrochloric acid and sodium hydroxide react to produce water and sodium chloride in an endothermic reaction. Which statement must be true of the reaction?(1 point) Responses The bond energy used to break the bo...
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Question When iron pipes come in contact with water and oxygen, iron transfers electrons to the oxygen molecules. Which statement about the reactants is correct?(1 point) Responses Oxygen is reduced, and iron is oxidized...
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Use the generalized equation to answer the question. A + BC → B + AC Which type of reaction is modeled by the equation? (1 point) Responses synthesis synthesis single replacement single replacement double replacement dou...
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Which generalized equation represents a double-replacement reaction?(1 point) Responses A + BC → B + AC A + BC → B + AC A + B → AB A + B → AB AB → A + B AB → A + B AB + CD → AD + CB AB + CD → AD + CB
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Question Molecules that are made up of two of the same atom have nonpolar covalent bonds. Which statement best explains this property?(1 point) Responses The atoms have the same number of valence electrons. The atoms hav...
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Question Under certain conditions, water can be separated into oxygen and hydrogen gases according to the equation 2H2O → 2H2 + O2. In a lab, 112g of hydrogen gas and 888g of oxygen gas were collected. Student A says tha...
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Question Use the periodic table to answer the question. The periodic table of elements shows element groups, periods, and element properties. How is an atom of the element xenon (Xe) likely to act during a chemical react...
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Question Use the periodic table to answer the question. An illustration shows the periodic table of elements with elements arranged in increasing order of atomic number in 18 columns (groups) and 7 rows (periods). Which...
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Which statement best describes a weak base?(1 point) Responses It donates protons and completely dissociates in water. It donates protons and completely dissociates in water. It accepts protons and only partially dissoci...
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How do temperature changes lead to solubility changes for salt dissolved in water?(1 point) Responses High temperatures mean more of the salt will be in the liquid form as it gradually melts, increasing solubility. High...
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Which example accurately describes a solution? (1 point) Responses Nonpolar fat molecules dissolve in water, which is polar. Nonpolar fat molecules dissolve in water, which is polar. Nonpolar oil molecules dissolve in wa...
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Question In an experiment involving a balloon, a scientist notices that the gas particles within the balloon begin to move faster, resulting in the balloon expanding. Which statement best describes the experiment?(1 poin...
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A person is drinking a glass of soda with ice. Which option describes the relative kinetic energy of molecules in and above the soda in the glass?(1 point) Responses in: least energy above: greatest energy in: least ener...
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Question Use the periodic table to answer the question. An illustration shows the periodic table of elements. Which of the following elements are most likely to form an ionic bond? (1 point) Responses K and Cl K and Cl K...
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Use the image of chlorophyll to answer the question. An illustration shows the structure of the chlorophyll molecule as a long chain of carbon atoms forming hexagonal and pentagonal structures at one end and a long tail...
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Hydrogen is in Group 1 of the periodic table. Which kind of bond would form between two hydrogens?(1 point) Responses A metallic bond would form because both atoms are metals. A metallic bond would form because both atom...
Asked by Mason 1 answer